Every lab marker
we test, explained

Storage form of vitamin D; foundational deficiency screen.

Why it matters
Deficiency is very common in women, worsens PMS and bone loss, and is associated with PCOS, preeclampsia, and breast cancer risk.

Higher levels
High vitamin D usually reflects supplementation; toxicity (>100 ng/mL) causes hypercalcemia, kidney stones, soft tissue calcification.

Lower levels
Low vitamin D (deficiency <20 ng/mL, insufficiency 20-30) is extremely common and contributes to bone loss, immune dysfunction, and mood/energy problems.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

B12 status within a comprehensive panel.

Why it matters
Common deficiency in women on metformin (PCOS), vegan diets, or with autoimmune gastritis; affects energy, mood, and nerves.

Higher levels
High B12 usually reflects supplementation; can also accompany liver disease or myeloproliferative disorders.

Lower levels
Low B12 (especially with high MMA) indicates true deficiency — common with vegan diets, pernicious anemia, PPI/metformin use, or older age.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Folate inside red blood cells; reflects long-term folate status better than serum folate.

Why it matters
Essential preconception and in pregnancy to prevent neural tube defects; RBC folate is the gold standard for stored folate.

Higher levels
High RBC folate reflects long-term adequate folate status or supplementation.

Lower levels
Low RBC folate confirms tissue-level deficiency more reliably than serum folate; risk factors include MTHFR variants, alcohol, methotrexate.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Current circulating folate; reflects recent intake.

Why it matters
Critical for women of reproductive age — adequate folate before conception dramatically reduces neural tube defect risk.

Higher levels
High serum folate usually reflects recent supplementation or fortified-food intake.

Lower levels
Low serum folate indicates inadequate recent intake or malabsorption; preceded by depleted RBC stores.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Essential mineral; deficiency causes muscle cramps, fatigue, and arrhythmia.

Why it matters
Magnesium deficiency is common in PMS, migraine, pregnancy, and menopause; supplementation can help cramps, sleep, and mood.

Higher levels
High magnesium can result from supplementation, antacid/laxative overuse, kidney failure, or adrenal insufficiency.

Lower levels
Low serum magnesium often appears with proton pump inhibitor use, alcohol, diuretics, GI losses, or poor intake.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Magnesium inside red cells; reflects long-term tissue stores better than serum magnesium.

Why it matters
More sensitive for chronic deficiency — useful when serum magnesium looks normal but symptoms (PMS, migraine, cramps) persist.

Higher levels
High RBC magnesium reflects supplementation or chronic intake adequacy.

Lower levels
Low RBC magnesium confirms true tissue-level deficiency even when serum magnesium is normal — common in chronic deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Amino acid; elevated levels suggest B-vitamin deficiency (B12, folate, B6) and increase cardiovascular and stroke risk.

Why it matters
Elevated homocysteine is associated with recurrent miscarriage, neural tube defects, and pregnancy complications.

Higher levels
High homocysteine raises cardiovascular and stroke risk; most commonly reflects B12, folate, or B6 deficiency, or kidney dysfunction.

Lower levels
Low homocysteine is generally favorable and uncommon.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Essential trace mineral involved in insulin sensitivity and glucose metabolism.

Why it matters
Has been studied for insulin resistance and gestational diabetes — though evidence is mixed, deficiency may worsen glucose control.

Higher levels
Elevated chromium can reflect occupational exposure (metal plating, leather tanning) or use of certain orthopedic implants.

Lower levels
Low chromium has been linked to impaired glucose tolerance, though clinical correlations are inconsistent.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Trace metal; component of vitamin B12 and marker of joint implant wear from metal-on-metal prostheses.

Why it matters
Relevant in younger women with hip implants planning pregnancy, since cobalt crosses the placenta.

Higher levels
Elevated cobalt can reflect metal-on-metal hip implant wear or occupational exposure.

Lower levels
Low cobalt is normal; cobalt is required only as part of vitamin B12.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Antioxidant essential for mitochondrial energy production; depleted by statins and age.

Why it matters
Increasingly used in fertility care — emerging evidence suggests CoQ10 supports egg quality in women trying to conceive, especially over 35.

Higher levels
High CoQ10 reflects supplementation or, rarely, a primary metabolic state.

Lower levels
Low CoQ10 is common with statin use, aging, heart failure, and several mitochondrial conditions.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Essential trace mineral; deficiency causes anemia and neuropathy, excess suggests Wilson's disease.

Why it matters
Estrogen raises copper levels (pregnancy, OCPs); imbalance affects iron metabolism and is linked to fatigue.

Higher levels
High copper accompanies acute inflammation, infection, pregnancy, oral estrogen use, and Wilson's disease (with low ceruloplasmin).

Lower levels
Low copper can result from excess zinc supplementation, malabsorption, or rare genetic conditions (Menkes disease).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Copper inside red cells; more reflective of tissue stores than serum copper.

Why it matters
Better measure of true copper status in women on oral contraceptives or in pregnancy when serum copper is artificially elevated.

Higher levels
High RBC copper is a marker of stored copper and helps confirm true copper status when serum levels are ambiguous.

Lower levels
Low RBC copper reflects depleted tissue stores even when serum copper looks normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Serum iodine; reflects very recent intake and supplementation.

Why it matters
Used to check adequacy of prenatal supplements; both deficiency and excess affect thyroid function critical to pregnancy.

Higher levels
Elevated iodine reflects excess intake from supplements, seaweed, iodine-containing contrast, or amiodarone.

Lower levels
Low iodine impairs thyroid hormone production and can cause goiter, hypothyroidism, and (in pregnancy) developmental delays.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Manganese as part of a comprehensive trace metal assessment.

Why it matters
Both deficiency and excess affect mood and bone health; included in functional medicine panels.

Higher levels
Elevated manganese can reflect occupational exposure (welding, mining) or chronic liver disease.

Lower levels
Low manganese is uncommon and usually clinically silent.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Rises with B12 deficiency before serum B12 falls; more sensitive detection of true deficiency.

Why it matters
Useful in women with low-normal B12, on metformin (PCOS), vegan diet, or with unexplained neuropathy or fatigue.

Higher levels
High MMA is a sensitive marker of B12 deficiency — rises before serum B12 looks low.

Lower levels
Low MMA effectively rules out functional B12 deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Selenium status — important for thyroid function and antioxidant defense.

Why it matters
Selenium is a thyroid cofactor; deficiency may worsen Hashimoto's thyroiditis, which is far more common in women.

Higher levels
Elevated selenium typically reflects supplementation; toxicity (selenosis) at very high levels causes hair/nail loss and GI issues.

Lower levels
Low selenium impairs thyroid hormone conversion and antioxidant defense; common with poor diet or in selenium-depleted soil regions.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Vitamin A within a comprehensive nutrient panel.

Why it matters
Vitamin A excess is teratogenic — preconception screening matters; deficiency affects eye health and immunity.

Higher levels
High retinol (vitamin A) typically reflects supplementation; toxicity (hypervitaminosis A) is serious and can damage the liver.

Lower levels
Low vitamin A impairs vision (especially in low light), skin/mucosal integrity, and immune function.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Thiamine status within a nutrient panel.

Why it matters
Deficiency causes hyperemesis gravidarum complications (Wernicke's) and is common in bariatric surgery patients.

Higher levels
High thiamine typically reflects supplementation and is not toxic in healthy people.

Lower levels
Low thiamine occurs in chronic alcoholism, malnutrition, hyperemesis gravidarum, post-bariatric surgery — and can cause Wernicke's encephalopathy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Cofactor for many enzymes and energy production.

Why it matters
Riboflavin can reduce migraine frequency — particularly relevant for women, who have 3x higher migraine rates.

Higher levels
High riboflavin typically reflects supplementation; non-toxic.

Lower levels
Low riboflavin can occur in alcoholism, malnutrition, or with certain medications.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pantothenic acid status.

Why it matters
Cofactor in adrenal hormone synthesis — sometimes included in fatigue and stress evaluation panels.

Higher levels
High B5 typically reflects supplementation; toxicity is rare.

Lower levels
Low B5 is uncommon (it's widespread in foods) but can contribute to fatigue and adrenal dysfunction in severe deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Vitamin B6 within a nutrient panel.

Why it matters
Used in PMS, morning sickness, and homocysteine reduction — particularly relevant in women's health protocols.

Higher levels
High B6 typically reflects supplementation; chronic excess (>200 mg/day) can paradoxically cause peripheral neuropathy.

Lower levels
Low B6 occurs with malabsorption, alcohol use, certain medications, and chronic disease.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Antioxidant and collagen cofactor; supports iron absorption and immune function.

Why it matters
Enhances non-heme iron absorption — practical adjunct for menstruating women with iron deficiency.

Higher levels
High vitamin C reflects supplementation; well-tolerated but can cause GI upset at very high doses.

Lower levels
Low vitamin C impairs collagen synthesis, immune function, and antioxidant defense; severe deficiency causes scurvy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Zinc status within a comprehensive nutrient panel.

Why it matters
Zinc supports immune function, skin, and hormone production; common deficiency in vegetarians and women on long-term OCPs.

Higher levels
High zinc typically reflects supplementation; chronic high intake can interfere with copper absorption.

Lower levels
Low zinc impairs immune function, wound healing, taste, and skin health; common with vegetarian/vegan diets, malabsorption, and chronic stress.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Zinc inside red cells; more sensitive for long-term status than plasma zinc.

Why it matters
Better measure of true zinc status when symptoms (hair loss, skin issues, immune problems) persist despite normal plasma.

Higher levels
High RBC zinc reflects supplementation or chronic intake adequacy.

Lower levels
Low RBC zinc confirms true tissue-level deficiency even when serum zinc is normal — more reliable for chronic status.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Folate status as part of micronutrient panel.

Why it matters
Foundational for women of reproductive age — neural tube defect prevention starts before conception.

Higher levels
High folate usually reflects recent supplementation or fortified-food intake.

Lower levels
Low folate indicates inadequate intake or malabsorption.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Iron status as part of a comprehensive nutrient panel.

Why it matters
Iron deficiency is the most common nutrient deficiency in women globally — should be checked routinely.

Higher levels
High iron can signal hemochromatosis, recent supplementation, hemolysis, or liver disease.

Lower levels
Low iron is consistent with iron deficiency, chronic inflammation, or insufficient intake.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Morning cortisol when levels peak; screens for adrenal insufficiency and Cushing's syndrome.

Why it matters
Cortisol dysregulation is common in chronic stress, perimenopause, and contributes to weight gain, sleep, and mood issues in women.

Higher levels
High morning cortisol can indicate physical/emotional stress, depression, exogenous steroids, or Cushing's syndrome.

Lower levels
Low morning cortisol raises concern for adrenal insufficiency (Addison's) or HPA-axis suppression from chronic steroid use.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Steroid precursor that helps diagnose 11-beta-hydroxylase deficiency, a form of congenital adrenal hyperplasia (CAH).

Why it matters
Late-onset CAH in women can present as irregular cycles, acne, hirsutism, and infertility — symptoms often misattributed to PCOS.

Higher levels
High 11-deoxycortisol can signal 11-beta-hydroxylase deficiency or be elevated after a metyrapone test that blocks cortisol production.

Lower levels
Low levels accompany adrenal insufficiency and are expected at baseline without metyrapone stimulation.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Adrenal steroid intermediate; used to evaluate 3-beta-hydroxysteroid dehydrogenase deficiency and adrenal androgen production.

Why it matters
Helps differentiate adrenal vs. ovarian causes of androgen excess (acne, hair loss, hirsutism) in women.

Higher levels
Elevated levels can suggest congenital adrenal hyperplasia, most often 3-beta-hydroxysteroid dehydrogenase deficiency.

Lower levels
Low values are expected and not typically clinically meaningful in isolation.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Primary screening test for non-classic congenital adrenal hyperplasia (NCAH) due to 21-hydroxylase deficiency.

Why it matters
NCAH affects ~1 in 1,000 women and often mimics PCOS with irregular periods, hirsutism, and infertility — testing distinguishes the two.

Higher levels
High levels in women suggest classic or non-classic congenital adrenal hyperplasia and can present alongside PCOS-like symptoms.

Lower levels
Low values are normal and not clinically actionable.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Adrenocorticotropic hormone from the pituitary; distinguishes pituitary, adrenal, and ectopic causes of cortisol disorders. TEST

Why it matters
Helps work up Cushing's syndrome and adrenal insufficiency, both of which can disrupt menstrual cycles, fertility, and pregnancy.

Higher levels
Elevated ACTH alongside high cortisol points to Cushing's disease or an ectopic ACTH source; high ACTH with low cortisol suggests primary adrenal insufficiency (Addison's).

Lower levels
Low ACTH with low cortisol points to secondary (pituitary) adrenal insufficiency or chronic glucocorticoid use suppressing the axis.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Adrenal hormone regulating sodium, potassium, and blood pressure; high levels suggest primary aldosteronism.

Why it matters
Primary aldosteronism is an under-recognized cause of resistant hypertension in women, especially during pregnancy or perimenopause.

Higher levels
High aldosterone suggests primary hyperaldosteronism (Conn's syndrome) or secondary causes like heart failure, cirrhosis, or renal artery stenosis.

Lower levels
Low aldosterone occurs in adrenal insufficiency and in selective hypoaldosteronism, often presenting with high potassium.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mass-spectrometry cortisol; more accurate than immunoassay, especially when other steroids are elevated.

Why it matters
Preferred during pregnancy, on hormone therapy, or with PCOS when standard immunoassays can be falsely elevated.

Higher levels
High total cortisol points to physical/emotional stress, Cushing's syndrome, depression, alcoholism, or exogenous steroids.

Lower levels
Low total cortisol suggests primary or secondary adrenal insufficiency, or HPA-axis suppression from chronic steroid therapy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Master precursor steroid that becomes all other steroid hormones.

Why it matters
Declines with age — sometimes evaluated in fatigue, libido, and adrenal-fatigue protocols common in midlife women.

Higher levels
High pregnenolone can reflect supplementation or, rarely, certain enzyme deficiencies in steroidogenesis.

Lower levels
Low pregnenolone declines with age and can accompany chronic stress, adrenal insufficiency, or statin use.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pituitary hormone that controls the thyroid; first-line thyroid screen.

Why it matters
Thyroid disease is 5–10x more common in women, peaks postpartum and at menopause; TSH is the single most important screen.

Higher levels
High TSH indicates primary hypothyroidism — most commonly Hashimoto's thyroiditis. Slight elevations can be subclinical hypothyroidism.

Lower levels
Low TSH points to hyperthyroidism (Graves', toxic nodule, thyroiditis), excess thyroid replacement, or rare pituitary failure.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Biologically active form of T4; key thyroid hormone test alongside TSH.

Why it matters
Foundational thyroid test — autoimmune thyroid disease (Hashimoto's, Graves') is 5–10x more common in women.

Higher levels
High free T4 (with low TSH) indicates hyperthyroidism — most often Graves' disease, thyroiditis, or excess replacement.

Lower levels
Low free T4 (with high TSH) indicates primary hypothyroidism — most often Hashimoto's thyroiditis.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Biologically active thyroid hormone available to tissues.

Why it matters
Free T3 can clarify thyroid status when TSH and Free T4 disagree, especially in women with autoimmune thyroid disease.

Higher levels
High free T3 indicates hyperthyroidism — Graves' disease, thyroiditis, excessive thyroid replacement, or T3 toxicosis.

Lower levels
Low free T3 suggests hypothyroidism, poor T4-to-T3 conversion, or non-thyroidal illness syndrome.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Most sensitive antibody for autoimmune thyroid disease (Hashimoto's, Graves').

Why it matters
TPO antibodies in women predict postpartum thyroiditis, miscarriage risk, and future hypothyroidism — essential preconception.

Higher levels
High TPO antibodies are the most specific marker of Hashimoto's thyroiditis; also common in Graves' disease and postpartum thyroiditis.

Lower levels
Low/negative TPO antibodies make autoimmune thyroid disease less likely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Inactive form of T3; rises with stress, illness, or extreme calorie restriction.

Why it matters
Elevated rT3 may explain hypothyroid-like symptoms despite 'normal' TSH — common consideration in women's functional thyroid evaluation.

Higher levels
High reverse T3 suggests reduced T3 conversion — common in stress, severe illness, fasting, and chronic disease.

Lower levels
Low reverse T3 is generally favorable, indicating efficient thyroid hormone conversion.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Autoantibody seen in Hashimoto's thyroiditis and after thyroid cancer treatment.

Why it matters
Hashimoto's is dramatically more common in women; antibodies often present years before TSH changes.

Higher levels
High thyroglobulin antibodies are common in Hashimoto's thyroiditis and Graves' disease.

Lower levels
Low/negative TgAb makes autoimmune thyroid disease less likely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone from thyroid C-cells; elevated levels suggest medullary thyroid carcinoma.

Why it matters
Medullary thyroid cancer is rarer than other thyroid cancers but thyroid cancer overall is 3x more common in women.

Higher levels
Elevated calcitonin can indicate medullary thyroid carcinoma and is monitored after thyroidectomy for that cancer.

Lower levels
Low calcitonin has no established clinical significance.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Total triiodothyronine — active thyroid hormone in protein-bound and free forms.

Why it matters
Useful in pregnancy, on hormonal therapy, and in evaluating hyperthyroidism in women.

Higher levels
High total T3 suggests hyperthyroidism (Graves' disease), thyroiditis, or excess thyroid hormone replacement.

Lower levels
Low total T3 occurs in hypothyroidism, severe illness ("euthyroid sick syndrome"), or starvation.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Older measure used to derive Free Thyroxine Index; largely replaced by direct Free T4.

Why it matters
Largely obsolete but occasionally needed when standard testing is unreliable, including in pregnancy.

Higher levels
High T3 uptake suggests low binding protein availability — often from low TBG (steroids, androgens) or hyperthyroidism.

Lower levels
Low T3 uptake suggests high binding protein availability — often from estrogen/pregnancy or hypothyroidism.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Gold-standard Free T4 measurement by equilibrium dialysis.

Why it matters
Preferred in pregnancy and when binding proteins are abnormal (on estrogen, OCPs, HRT).

Higher levels
High free T4 by direct dialysis confirms hyperthyroidism — most accurate when binding-protein abnormalities make standard free T4 unreliable.

Lower levels
Low free T4 confirms hypothyroidism — useful in pregnancy and when other free T4 methods give inconsistent results.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

TSH with automatic Free T4 if TSH is abnormal — efficient thyroid screening.

Why it matters
Optimal initial thyroid screen for women, especially preconception, postpartum, and at midlife.

Higher levels
High TSH triggers a reflex free T4 measurement to confirm and quantify hypothyroidism.

Lower levels
Low TSH triggers a reflex free T4 to evaluate hyperthyroidism severity.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Sequential thyroid testing — TSH first, then Free T4, then T3 or antibodies as needed.

Why it matters
Cost-effective thyroid workup for women given high prevalence of thyroid disease.

Higher levels
The reflex cascade automatically adds free T4, free T3, and antibody tests when TSH is abnormal — interpretation depends on the full pattern.

Lower levels
Same — the cascade fires based on TSH abnormality; "low" applies to the underlying TSH.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Protein on every atherogenic ('bad') particle (LDL, VLDL, Lp(a)); often more predictive of cardiac risk than LDL-C.

Why it matters
Women's traditional lipid panels can underestimate risk; ApoB gives a truer particle count, especially around menopause.

Higher levels
Elevated ApoB is a stronger predictor of cardiovascular risk than LDL-C alone — every atherogenic particle carries exactly one ApoB.

Lower levels
Low ApoB indicates a low burden of atherogenic particles and a favorable cardiovascular profile.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Genetically determined atherogenic particle that independently raises heart and stroke risk.

Why it matters
Elevated Lp(a) is an under-recognized cardiac risk factor in women, especially post-menopause when other lipids worsen.

Higher levels
High Lp(a) is a genetically-determined independent risk factor for premature cardiovascular disease and aortic stenosis.

Lower levels
Low Lp(a) is cardio-protective and requires no intervention.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

High-sensitivity CRP; cardiovascular inflammation marker at low ranges.

Higher levels
For cardiovascular risk, hs-CRP above 2 mg/L indicates elevated risk; above 3 mg/L is high risk. Levels above 10 mg/L suggest active infection or significant inflammation requiring further workup. In women, elevated hs-CRP independently predicts heart attack and stroke risk and is associated with PCOS, insulin resistance, and autoimmune disease.

Lower levels
hs-CRP below 1 mg/L reflects minimal systemic inflammation and low cardiovascular inflammatory risk. No clinical action is required, but maintaining an anti-inflammatory lifestyle — regular movement, whole-food diet, stress management, quality sleep — continues to be protective.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

'Good' cholesterol; higher levels protect against cardiovascular disease.

Why it matters
Estrogen raises HDL — typically higher in premenopausal women than men, but drops after menopause, contributing to rising cardiac risk.

Higher levels
High HDL is generally cardio-protective but extremely high HDL (>100 mg/dL) may not provide additional benefit and warrants investigation.

Lower levels
Low HDL increases cardiovascular risk and is common with insulin resistance, sedentary lifestyle, smoking, and hypertriglyceridemia.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Blood fat from diet and liver production; high levels increase cardiac and pancreatitis risk.

Why it matters
Rise in pregnancy, with estrogen therapy, with PCOS, and at menopause — important to monitor in women.

Higher levels
High triglycerides reflect excess carbs/alcohol, insulin resistance, obesity, hypothyroidism, or genetic dyslipidemias.

Lower levels
Low triglycerides are generally favorable; very low values can reflect malnutrition or hyperthyroidism.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Main protein in HDL ('good' cholesterol); higher levels are cardioprotective.

Why it matters
Estrogen raises ApoA1, so levels drop after menopause — partial explanation for the rise in women's cardiac risk post-menopause.

Higher levels
High ApoA1 is generally cardio-protective, reflecting a healthy HDL pool.

Lower levels
Low ApoA1 raises cardiovascular risk and is common with insulin resistance, hypertriglyceridemia, and inflammation.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Released by stressed heart muscle; elevated in heart failure and helps differentiate cardiac vs. pulmonary causes of shortness of breath.

Why it matters
Useful for peripartum cardiomyopathy and for distinguishing pregnancy-related dyspnea from heart failure.

Higher levels
High BNP indicates ventricular stretch from heart failure, fluid overload, or pulmonary embolism; higher values track with worse prognosis.

Lower levels
Low BNP effectively rules out clinically significant heart failure in symptomatic patients.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Sum of all cholesterol particles; broad cardiovascular risk indicator.

Why it matters
Pregnancy nearly doubles total cholesterol; menopause typically raises it. Trend matters more than single value in women.

Higher levels
High total cholesterol is a traditional risk marker for cardiovascular disease but is less specific than ApoB or LDL-particle count.

Lower levels
Very low total cholesterol can reflect malnutrition, hyperthyroidism, severe liver disease, or genetic hypobetalipoproteinemia.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Inflammation marker specific to vascular plaque; elevated levels increase cardiovascular event risk.

Why it matters
Refines cardiovascular risk in women with intermediate Framingham scores or after menopause when risk rises.

Higher levels
High Lp-PLA2 activity indicates vascular inflammation and adds to cardiovascular risk independently of LDL.

Lower levels
Low Lp-PLA2 is favorable from a vascular-inflammation standpoint.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Oxidized LDL particles — more atherogenic than native LDL.

Why it matters
Refines cardiovascular risk in women, especially when standard lipids look normal but inflammation or PCOS is present.

Higher levels
Elevated oxidized LDL indicates that LDL particles are being damaged by oxidative stress — a key step in plaque formation.

Lower levels
Low OxLDL is favorable from a cardiovascular-risk standpoint.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Gut-microbiome-derived metabolite linked to cardiovascular and kidney disease risk.

Why it matters
Emerging cardiovascular marker — relevant given women's underestimated cardiac risk and microbiome shifts at menopause.

Higher levels
High TMAO is associated with increased cardiovascular and kidney disease risk — driven by gut bacteria and diet rich in red meat, eggs, and dairy.

Lower levels
Low TMAO is favorable from a cardiovascular standpoint.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Small dense LDL particles — the most atherogenic LDL subtype.

Why it matters
Often elevated in women with PCOS, metabolic syndrome, and at menopause despite normal total LDL — refines true cardiac risk.

Higher levels
High small dense LDL is more atherogenic than buoyant LDL — common with insulin resistance, hypertriglyceridemia, and metabolic syndrome.

Lower levels
Low sdLDL is favorable; suggests the lipid profile is dominated by larger, less harmful LDL particles.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Direct measurement of LDL cholesterol (vs. calculated); more accurate when triglycerides are high or after meals.

Why it matters
Better LDL accuracy in women with metabolic syndrome, PCOS, or pregnancy when triglycerides are elevated.

Higher levels
Elevated direct LDL is a primary driver of atherosclerosis and cardiovascular events; goal levels depend on overall risk.

Lower levels
Low direct LDL is cardio-protective; very low values are typical with high-intensity statin or PCSK9 inhibitor therapy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Blood sugar level; foundational metabolic test.

Higher levels
High glucose can follow a recent meal, stress, or illness, or reflect insulin resistance. A fasting value of 100-125 mg/dL suggests prediabetes, and 126 mg/dL or higher on repeat testing suggests diabetes.

Lower levels
Low glucose (hypoglycemia) can cause shakiness, sweating, or confusion; it can follow a long fast, intense exercise, alcohol, or diabetes medicines.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Average blood glucose over the past ~3 months; diagnoses and monitors diabetes.

Why it matters
Used in PCOS screening, pre-pregnancy diabetes assessment, and gestational diabetes follow-up; less reliable during pregnancy itself.

Higher levels
Elevated A1c indicates average blood glucose over the past 3 months has been high; >=6.5% diagnoses diabetes, 5.7-6.4% prediabetes.

Lower levels
Low A1c reflects either tight glucose control or conditions that shorten red-cell lifespan (anemia, hemolysis, recent bleeding).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Measures 1,5-AG, a sugar that drops when blood glucose spikes; reflects glucose excursions over the past 1–2 weeks.

Why it matters
Useful for women with PCOS, gestational diabetes risk, or early insulin resistance whose A1c looks normal but who still have post-meal glucose spikes.

Higher levels
Elevated 1,5-AG is uncommon and not clinically actionable; the marker is interpreted primarily through its lower range.

Lower levels
Low 1,5-AG suggests recent post-meal glucose spikes have been spilling into urine, even when fasting glucose and A1c appear controlled.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone secreted by fat cells that improves insulin sensitivity and has anti-inflammatory effects; low levels associate with metabolic syndrome.

Why it matters
Often low in women with PCOS independent of weight, contributing to insulin resistance and cardiovascular risk.

Higher levels
Higher adiponectin generally tracks with better insulin sensitivity and lower cardiovascular risk; very high levels can occur in chronic kidney disease.

Lower levels
Low adiponectin is common in obesity, insulin resistance, type 2 diabetes, and metabolic syndrome.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Byproduct of insulin production; distinguishes endogenous insulin (made by pancreas) from injected insulin and assesses beta-cell function.

Why it matters
Helps classify diabetes type in women with gestational or post-pregnancy diabetes and clarifies PCOS-related insulin dynamics.

Higher levels
High C-peptide with high glucose suggests insulin resistance / type 2 diabetes; with low glucose, it can indicate an insulin-secreting tumor.

Lower levels
Low C-peptide reflects poor insulin production — typical of type 1 diabetes or advanced beta-cell exhaustion.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Reflects average blood glucose over the past 2–3 weeks (shorter window than A1c).

Why it matters
Preferred over A1c in pregnancy when red cell turnover is faster and A1c can be falsely low; useful in gestational diabetes management.

Higher levels
Elevated fructosamine indicates average blood glucose over the past 2-3 weeks has been high.

Lower levels
Low fructosamine reflects either well-controlled glucose or low serum protein (which artifactually lowers the result).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone that raises blood sugar; opposes insulin and helps evaluate rare pancreatic tumors.

Why it matters
Used in workup of unexplained hyperglycemia and necrolytic migratory erythema in women with rare glucagonomas.

Higher levels
High glucagon points to glucagonoma, prolonged fasting, severe stress, or type 2 diabetes with insulin resistance.

Lower levels
Low glucagon is uncommon and can occur in chronic pancreatitis or congenital deficiencies.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pituitary hormone affecting growth and metabolism; abnormal in acromegaly and GH deficiency.

Why it matters
GH deficiency in adult women contributes to fatigue, central adiposity, and bone loss; acromegaly disrupts cycles and fertility.

Higher levels
High GH suggests acromegaly (in adults), gigantism (in children), or a pituitary tumor; transient spikes occur with stress and exercise.

Lower levels
Low GH points to growth hormone deficiency, pituitary failure, or normal aging.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

A1c with automatic 1,5-AG follow-up when A1c is borderline; captures glucose excursions A1c misses.

Why it matters
Particularly useful in women with PCOS or post-gestational diabetes whose A1c looks normal despite post-meal spikes.

Higher levels
Same as standard A1c — elevated values indicate poor 3-month glycemic control. The 1,5-AG reflex adds short-term excursion data when A1c is borderline.

Lower levels
Same caveats as standard A1c; the reflex test fires when A1c is in the diabetes-suspicious range.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone made by fat cells signaling satiety; elevated in obesity and decreased in malnutrition.

Why it matters
Low leptin causes hypothalamic amenorrhea in athletes and women with eating disorders, disrupting cycles and fertility.

Higher levels
High leptin is paradoxically common in obesity — fat cells make plenty, but the brain becomes resistant to its appetite-suppressing signal.

Lower levels
Low leptin indicates low body fat, severe caloric restriction, hypothalamic amenorrhea, or rare congenital leptin deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Autoantibody in type 1 diabetes; helps distinguish T1D from T2D and LADA.

Why it matters
Useful in women with new-onset diabetes during/after pregnancy when classifying diabetes type.

Higher levels
A positive ZnT8 antibody is highly specific for autoimmune (type 1) diabetes — confirms the immune-mediated nature of beta cell destruction.

Lower levels
Low/negative ZnT8 doesn't rule out type 1 diabetes (other autoantibodies may still be positive) but lowers the probability.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone that lowers blood sugar; elevated levels indicate insulin resistance.

Why it matters
Foundational test in PCOS, perimenopause, and weight-loss workups — insulin resistance is central to many women's metabolic issues.

Higher levels
High fasting insulin is the hallmark of insulin resistance — your pancreas works harder to keep glucose normal until it can't.

Lower levels
Low fasting insulin is normal in metabolically healthy lean individuals; very low values with high glucose suggest type 1 or advanced type 2 diabetes.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Liver enzyme; elevations indicate liver cell injury from fatty liver disease, hepatitis, medications, or alcohol.

Higher levels
Elevated ALT signals liver-cell injury — most often from fatty liver, alcohol, viral hepatitis, or hepatotoxic medications.

Lower levels
Low ALT is generally benign but can occasionally reflect vitamin B6 deficiency or low muscle mass.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Liver and muscle enzyme; with ALT, evaluates liver injury patterns.

Higher levels
Elevated AST is less liver-specific than ALT — significant rises occur with muscle injury, hemolysis, or heart events as well as hepatitis.

Lower levels
Low AST is generally benign and not clinically meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Liver enzyme sensitive to alcohol use and bile-duct obstruction; rises in fatty liver disease.

Why it matters
Helpful in evaluating elevated alkaline phosphatase (distinguishes liver vs. bone origin) and screens for liver disease in women.

Higher levels
Elevated GGT indicates bile-duct injury, fatty liver, alcohol use, or hepatotoxic medication exposure — the most sensitive routine liver enzyme.

Lower levels
Low GGT is generally benign.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Main protein in blood; reflects liver synthesis, nutritional status, and inflammation.

Higher levels
High albumin almost always reflects dehydration — your blood is more concentrated than normal. Rehydration typically resolves mildly elevated values. True hyperalbuminemia is clinically rare and not concerning on its own.

Lower levels
Low albumin (hypoalbuminemia) can signal liver disease, malnutrition, chronic kidney disease, or significant inflammation. In pregnancy, falling albumin may indicate nutritional deficiency or early preeclampsia risk. It also impairs the transport of hormones and medications throughout the body.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Enzyme from liver, bone, and placenta; elevations point to bone turnover, liver disease, or pregnancy.

Higher levels
High ALP points to the liver or bile ducts (often alongside a high GGT) or to bone turnover, such as a healing fracture, vitamin D deficiency, or bone disease; it normally rises in pregnancy.

Lower levels
Low ALP is uncommon and usually not concerning; it can reflect zinc or magnesium deficiency, malnutrition, low thyroid function, or, rarely, the inherited condition hypophosphatasia.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Total breakdown product of red blood cells; high levels cause jaundice.

Higher levels
High bilirubin can reflect liver disease, a bile-duct blockage, or faster breakdown of red cells; a mild, isolated rise is often Gilbert syndrome, a harmless inherited trait. Very high levels cause jaundice.

Lower levels
Low bilirubin is not considered clinically significant.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Total protein in blood; reflects nutrition, liver synthesis, and inflammation.

Higher levels
High total protein points to dehydration, chronic inflammation, or monoclonal gammopathy/multiple myeloma.

Lower levels
Low total protein occurs with malnutrition, malabsorption, liver disease, kidney protein loss, or burns.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Protein that protects lungs and liver from enzyme damage; deficiency causes early lung and liver disease.

Why it matters
Hormonal changes in pregnancy alter A1AT levels; deficiency increases risk of pregnancy-related liver dysfunction.

Higher levels
Elevated AAT is an acute-phase response to inflammation, infection, hormonal contraceptives, or pregnancy.

Lower levels
Low AAT can indicate alpha-1-antitrypsin deficiency — a genetic risk factor for early-onset emphysema and liver disease.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Toxic nitrogen byproduct cleared by the liver; elevations cause confusion and indicate severe liver dysfunction.

Why it matters
Important in evaluating altered mental status in pregnancy (acute fatty liver, HELLP) and urea cycle disorder carriers.

Higher levels
Elevated ammonia accumulates when the liver can't convert it to urea — common in cirrhosis, hepatic encephalopathy, or urea-cycle disorders.

Lower levels
Low ammonia is not clinically meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The conjugated (water-soluble) form of bilirubin; elevations suggest bile-duct obstruction or hepatocellular disease.

Why it matters
Cholestasis of pregnancy raises direct bilirubin and carries fetal risk — making this an important obstetric flag.

Higher levels
Elevated direct bilirubin signals impaired bile excretion — bile-duct obstruction, cholestasis, or hepatocyte injury.

Lower levels
Low direct bilirubin is normal and not clinically meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Copper-carrying protein; low levels suggest Wilson's disease, high levels reflect inflammation or estrogen state.

Why it matters
Estrogen raises ceruloplasmin — values change in pregnancy and on oral contraceptives, which must be considered in interpretation.

Higher levels
High ceruloplasmin rises with inflammation, pregnancy, oral estrogen, and certain liver conditions.

Lower levels
Low ceruloplasmin can indicate Wilson's disease (copper overload) or severe copper deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Enzyme released from damaged cells in many tissues; elevated in hemolysis, tissue injury, and some cancers.

Why it matters
Marker of hemolysis in HELLP syndrome — a pregnancy emergency — and tumor burden in some gynecologic cancers.

Higher levels
Elevated LDH is a nonspecific marker of tissue damage — hemolysis, liver disease, cancer, heart events, or muscle injury.

Lower levels
Low LDH is generally benign.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Short-half-life protein; reflects recent nutritional status better than albumin.

Why it matters
Used in nutritional assessment for women with hyperemesis, eating disorders, or post-bariatric surgery.

Higher levels
High prealbumin is uncommon but can occur with Hodgkin's lymphoma or steroid use.

Lower levels
Low prealbumin is a sensitive marker of acute protein-calorie malnutrition or inflammation — drops within days of poor intake.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Kidney function marker influenced by hydration and protein intake.

Why it matters
Useful in pregnancy (where normal values are lower due to volume expansion) and in evaluating hyperemesis.

Higher levels
High BUN indicates dehydration, high-protein diet, GI bleeding, kidney dysfunction, or catabolic states.

Lower levels
Low BUN can reflect liver dysfunction, low protein intake, malnutrition, or overhydration.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Essential mineral for bones, nerves, and muscles; tightly regulated by parathyroid hormone and vitamin D.

Higher levels
Elevated calcium (hypercalcemia) is most commonly caused by primary hyperparathyroidism or malignancy. Symptoms include fatigue, nausea, constipation, excessive thirst, and kidney stones. Follow-up with PTH and vitamin D tests is typically needed to identify the cause.

Lower levels
Low calcium (hypocalcemia) results most commonly from vitamin D deficiency, hypoparathyroidism, or kidney disease. Women are at elevated risk post-menopause as bone metabolism shifts. Symptoms include muscle cramps, tingling in the extremities, and in severe deficiency, tetany.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mostly bicarbonate, the blood's main buffer; part of the metabolic panel used to assess acid-base balance.

Higher levels
High CO2 (bicarbonate) suggests metabolic alkalosis or compensation for a breathing problem; causes include vomiting or diuretic use.

Lower levels
Low CO2 suggests metabolic acidosis or compensation, seen with kidney disease, severe diarrhea, or uncontrolled diabetes.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Major electrolyte; evaluates acid-base balance and hydration with sodium and bicarbonate.

Higher levels
High chloride often comes with dehydration or with a form of metabolic acidosis, for example after prolonged diarrhea or with certain kidney conditions.

Lower levels
Low chloride can follow prolonged vomiting, diuretic use, or fluid overload, and often moves together with low sodium.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

A muscle waste product cleared by the kidneys; the core marker used to estimate kidney filtration (eGFR).

Higher levels
High creatinine indicates reduced kidney filtration; it can also rise with dehydration or high muscle mass.

Lower levels
Low creatinine is usually benign, reflecting low muscle mass, pregnancy, or overhydration.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Estimated glomerular filtration rate from creatinine, the standard measure of how well your kidneys filter blood.

Higher levels
A higher eGFR means better kidney filtration; values in the normal range indicate healthy kidney function.

Lower levels
A low eGFR indicates reduced kidney function; persistently low values define chronic kidney disease.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Serum potassium — standard electrolyte assessment.

Higher levels
High serum potassium can be artifactual from sample hemolysis or genuinely high from kidney failure, drugs, or cell breakdown.

Lower levels
Low serum potassium occurs with diuretics, GI losses, hyperaldosteronism, or refeeding syndrome.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Major electrolyte; evaluates hydration and brain/kidney homeostasis.

Higher levels
High sodium (hypernatremia) usually means too little water for the salt in your blood, as with dehydration, low fluid intake, or heavy sweating.

Lower levels
Low sodium (hyponatremia) can follow drinking large amounts of water, diuretics or some antidepressants, or heart, liver, kidney, or hormonal conditions; larger drops cause headache, nausea, or confusion.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The biologically active form of calcium, independent of albumin levels.

Why it matters
More accurate calcium status in pregnancy and critical illness when albumin shifts; important for parathyroid disease workup.

Higher levels
High ionized calcium points to hyperparathyroidism, malignancy, vitamin D toxicity, or excess calcium/antacid intake.

Lower levels
Low ionized calcium occurs in hypoparathyroidism, vitamin D deficiency, severe magnesium deficiency, or critical illness.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Indicator of tissue hypoxia, sepsis, or metabolic stress.

Why it matters
Rises in sepsis (including in postpartum infections) and DKA in pregnancy; critical-care marker.

Higher levels
Elevated lactate signals tissue hypoperfusion, sepsis, mitochondrial dysfunction, severe exercise, or metformin-associated acidosis.

Lower levels
Low lactate is normal and not clinically meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Measures blood concentration; evaluates hydration, sodium disorders, and pituitary function.

Why it matters
Important in evaluating hyperemesis gravidarum, SIADH, and diabetes insipidus — all relevant in pregnancy.

Higher levels
High serum osmolality indicates dehydration, uncontrolled diabetes, or toxin ingestion (methanol, ethylene glycol, ethanol).

Lower levels
Low osmolality signals water overload, SIADH, polydipsia, or low solute intake.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mineral important for bone, energy (ATP), and cell membranes.

Why it matters
Alterations in phosphate accompany bone disease, kidney disease, and refeeding syndrome (eating-disorder recovery).

Higher levels
High phosphate points to kidney dysfunction, hypoparathyroidism, vitamin D toxicity, or rhabdomyolysis.

Lower levels
Low phosphate occurs with refeeding syndrome, alcoholism, vitamin D deficiency, hyperparathyroidism, or phosphate-binding antacids.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Purine metabolism end-product; high levels cause gout and kidney stones.

Why it matters
Elevated uric acid in pregnancy is a preeclampsia marker; also linked to PCOS and metabolic syndrome in women.

Higher levels
High uric acid points to gout, high-purine diet (red meat, alcohol), kidney dysfunction, or metabolic syndrome.

Lower levels
Low uric acid is generally benign but very low values can occur with certain medications or rare genetic conditions.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pancreatic enzyme that rises with pancreatitis.

Why it matters
Pregnancy increases pancreatitis risk (often due to gallstones); useful in evaluating severe abdominal pain in pregnant women.

Higher levels
Elevated amylase points to acute pancreatitis, salivary gland inflammation (mumps), or bowel obstruction.

Lower levels
Low amylase can reflect chronic pancreatic burnout, severe liver disease, or cystic fibrosis.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pancreatic enzyme more specific than amylase for pancreatitis.

Why it matters
Helps diagnose pancreatitis in pregnancy — more common due to gallstones and hypertriglyceridemia during pregnancy.

Higher levels
High lipase is the most specific marker of pancreatic injury — acute pancreatitis, pancreatic duct obstruction, or pancreatic trauma.

Lower levels
Low lipase can reflect chronic pancreatic damage or cystic fibrosis but is rarely clinically actionable.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Primary estrogen during reproductive years; produced by ovaries.

Why it matters
Core marker for ovulation, cycle phase, fertility, perimenopause, and HRT monitoring — foundational to women's health.

Higher levels
High estradiol in women is normal during the follicular peak/ovulation; outside that window it can signal estrogen excess, ovarian tumors, or estrogen-containing supplements.

Lower levels
Low estradiol is normal post-menopause; pre-menopause it suggests ovarian insufficiency, hypothalamic amenorrhea, or relative androgen excess.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Confirms ovulation and supports luteal phase; rises in second half of cycle and pregnancy.

Why it matters
Core fertility marker — confirms ovulation, monitors luteal-phase support in IVF, and tracks early pregnancy health.

Higher levels
High progesterone confirms ovulation in the luteal phase, indicates pregnancy, or signals ovarian/adrenal hyperplasia outside those settings.

Lower levels
Low progesterone in the luteal phase suggests anovulation or luteal-phase defect; in early pregnancy it predicts miscarriage risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pituitary hormone that drives ovarian follicle growth; rises with ovarian decline.

Why it matters
Foundational for diagnosing menopause, primary ovarian insufficiency, and infertility workups; pairs with estradiol and AMH.

Higher levels
High FSH in pre-menopausal women indicates diminished ovarian reserve; in men, primary testicular failure. Peri/postmenopause is normally high.

Lower levels
Low FSH suggests pituitary or hypothalamic dysfunction, hormonal contraceptive use, or pregnancy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pituitary hormone that triggers ovulation and supports luteal phase.

Why it matters
Foundational for cycle assessment, ovulation prediction, PCOS diagnosis (elevated LH:FSH ratio), and menopause workup.

Higher levels
High LH triggers ovulation (mid-cycle spike) and is also elevated in PCOS (often with LH:FSH >2) and primary gonadal failure.

Lower levels
Low LH suggests hypothalamic/pituitary dysfunction, hormonal contraceptive use, or pregnancy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mass-spec total testosterone; accurate at low female-range levels.

Why it matters
Preferred for women because immunoassay testosterone is unreliable in the low female range — gold standard for PCOS and androgen workups.

Higher levels
High total testosterone in women points to PCOS, CAH, or androgen-secreting tumor; in men, supplementation or rare adrenal/testicular tumor.

Lower levels
Low total testosterone in men suggests primary or secondary hypogonadism; in women, it can reflect adrenal insufficiency or aging.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Biologically active testosterone — what's actually working at tissues.

Why it matters
Often more useful than total testosterone in women — elevated free T explains hirsutism and acne despite 'normal' total.

Higher levels
High free testosterone in women suggests PCOS, congenital adrenal hyperplasia, or androgen-secreting tumor; in men, supplementation or exogenous androgen use.

Lower levels
Low free testosterone in men suggests hypogonadism; in women, it can contribute to low libido, fatigue, and reduced muscle/bone strength.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Protein that binds sex hormones; controls how much is biologically active.

Why it matters
Low SHBG is a key marker of insulin resistance in PCOS; estrogen and thyroid hormone raise SHBG; foundational for evaluating androgens.

Higher levels
High SHBG binds up testosterone, lowering free testosterone — common with hyperthyroidism, oral estrogen, anorexia, or liver disease.

Lower levels
Low SHBG raises free testosterone — common with insulin resistance, PCOS, obesity, hypothyroidism, or androgen use.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Adrenal androgen precursor; reflects adrenal androgen production and declines with age.

Why it matters
Elevated levels point to adrenal causes of androgen excess in women (vs. ovarian/PCOS); declines linked to libido, energy, and bone density.

Higher levels
High DHEA-S in women suggests PCOS, adrenal androgen excess, or rarely an adrenal tumor.

Lower levels
Low DHEA-S is normal with aging but extreme drops suggest adrenal insufficiency or chronic stress.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Produced by ovarian follicles; reflects remaining egg supply (ovarian reserve).

Why it matters
Core fertility marker — predicts response to IVF, time to menopause, and is often elevated in PCOS.

Higher levels
High AMH suggests robust ovarian reserve, but markedly elevated levels can signal PCOS.

Lower levels
Low AMH suggests diminished ovarian reserve — fewer remaining follicles and reduced fertility potential.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Pituitary hormone that drives lactation; elevations cause cycle irregularity and infertility.

Why it matters
Common cause of amenorrhea, galactorrhea, and infertility in women — should be checked when periods stop or fertility issues arise.

Higher levels
High prolactin suggests a pituitary tumor (prolactinoma), hypothyroidism, dopamine-blocking medications, pregnancy, or breastfeeding.

Lower levels
Low prolactin is rarely clinically significant outside of pituitary failure.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Adrenal and ovarian androgen precursor that converts to testosterone and estrogen.

Why it matters
Often elevated in PCOS, CAH, and androgen-secreting tumors; key marker when evaluating hirsutism, acne, or hair loss in women.

Higher levels
Elevated androstenedione points to PCOS, congenital adrenal hyperplasia, or an androgen-producing tumor.

Lower levels
Low levels accompany adrenal insufficiency or perimenopause/menopause.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Potent androgen converted from testosterone by 5-alpha-reductase; drives hair follicle and skin androgen effects.

Why it matters
Elevated DHT contributes to female pattern hair loss, hirsutism, and acne, even with normal total testosterone.

Higher levels
Elevated DHT in women drives androgenic alopecia and hirsutism; in men, it's linked to BPH and pattern baldness.

Lower levels
Low DHT can occur with 5-alpha-reductase inhibitor use (finasteride, dutasteride) or rare congenital deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

High-sensitivity mass-spec estradiol; accurate at very low levels (menopause, pediatric, men).

Why it matters
Preferred for postmenopausal women, on aromatase inhibitors after breast cancer, or when monitoring low-dose HRT.

Higher levels
Elevated ultrasensitive estradiol carries the same significance as standard estradiol but at the very low end of the range.

Lower levels
Low values matter more here — used to evaluate ovarian status in menopause, men, or children where standard assays underperform.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Estrogen made by the placenta during pregnancy; low levels signal fetal/placental dysfunction.

Why it matters
Part of the maternal serum screen for Down syndrome and trisomy 18; monitors fetal well-being in late pregnancy.

Higher levels
High estriol is normal in pregnancy (where placenta is the source); abnormally high outside pregnancy is rare.

Lower levels
Low estriol in pregnancy can signal placental dysfunction or fetal complications.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Sum of all major estrogens (E1, E2, E3); broad estrogen status snapshot.

Why it matters
Useful in evaluating overall estrogen exposure — relevant for breast cancer risk, perimenopause, and HRT adjustments.

Higher levels
High total estrogens reflect physiologic peaks (ovulation, pregnancy), exogenous estrogen, or estrogen-secreting tumors.

Lower levels
Low total estrogens are normal in menopause and reflect ovarian insufficiency at younger ages.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Weaker estrogen that becomes the dominant estrogen after menopause; made in fat tissue.

Why it matters
Helps evaluate postmenopausal women, breast cancer recurrence risk, and conversion of androgens to estrogen in obesity.

Higher levels
High estrone is most common in postmenopausal women (where adipose conversion takes over) and in obesity.

Lower levels
Low estrone in pre-menopause may accompany ovarian insufficiency or hypothalamic amenorrhea.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Quantitative blood hCG; tracks pregnancy progression and detects ectopic or molar pregnancy.

Why it matters
Used to confirm pregnancy, monitor early viability, and follow up miscarriage, ectopic, and molar pregnancy — central to early obstetric care.

Higher levels
High hCG most commonly indicates pregnancy; outside pregnancy, it can signal gestational trophoblastic disease or rare germ-cell tumors.

Lower levels
Low hCG is normal when not pregnant; in early pregnancy, slow rise can indicate ectopic pregnancy or miscarriage.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mass-spec progesterone — more accurate than immunoassay, especially at low levels.

Why it matters
Preferred for postmenopausal women, on HRT, or when monitoring low-luteal-phase progesterone.

Higher levels
Same interpretation as standard progesterone — confirms ovulation, pregnancy, or hyperplasia.

Lower levels
Low values carry the same significance: anovulation, luteal-phase defect, or pregnancy at risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Iron storage protein; low levels diagnose iron deficiency before anemia develops.

Why it matters
Menstruating women are at high risk for iron deficiency; ferritin is the single best test — useful in fatigue, hair loss, and pregnancy planning.

Higher levels
High ferritin can reflect iron overload (hemochromatosis), but also rises with inflammation, liver disease, or alcohol use.

Lower levels
Low ferritin is the most sensitive indicator of iron deficiency — often present before anemia develops.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Iron in circulation; part of iron studies along with TIBC, ferritin, and saturation.

Why it matters
Used with ferritin and TIBC to characterize iron deficiency — extremely common in menstruating and pregnant women.

Higher levels
High serum iron can signal hemochromatosis, recent iron supplementation, hemolysis, or liver disease.

Lower levels
Low serum iron is consistent with iron deficiency, chronic inflammation, or insufficient intake/absorption.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Iron-transport protein; rises in iron deficiency.

Why it matters
Part of comprehensive iron studies in evaluating anemia common in menstruating and pregnant women.

Higher levels
High transferrin (with low ferritin) indicates iron deficiency — your body upregulates the carrier to grab any iron available.

Lower levels
Low transferrin can reflect iron overload, chronic inflammation, malnutrition, or liver disease.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The total number of white blood cells, your immune system's frontline defense against infection.

Higher levels
A high white count usually signals infection or inflammation, but can also reflect stress, steroids, or a blood disorder.

Lower levels
A low white count raises infection risk and can result from viral illness, certain medications, or marrow problems.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Number of red cells per volume; evaluates anemia and polycythemia.

Higher levels
A high red cell count can reflect dehydration, smoking, high altitude, or a lung or heart condition; less often, a bone-marrow disorder (polycythemia vera).

Lower levels
A low red cell count indicates anemia from iron, vitamin B12, or folate deficiency, blood loss, chronic illness, or reduced bone-marrow production.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Oxygen-carrying protein in red blood cells; primary anemia screen.

Higher levels
High hemoglobin most often reflects dehydration, smoking, or living at high altitude; less often it points to a lung or heart condition or a bone-marrow disorder (polycythemia).

Lower levels
Low hemoglobin means anemia. In women it is most often iron deficiency (heavy periods, pregnancy, low intake); vitamin B12 or folate deficiency, blood loss, and chronic illness are other causes.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Percentage of blood volume that is red blood cells; lower in anemia.

Higher levels
High hematocrit usually reflects dehydration, smoking, or living at high altitude; less often, a bone-marrow disorder that overproduces red cells.

Lower levels
Low hematocrit points to anemia, from iron, vitamin B12, or folate deficiency, blood loss, or chronic illness; it also dips with extra fluid in the blood, as in pregnancy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The average size of your red blood cells; the first clue to whether an anemia is from iron deficiency, B12/folate deficiency, or another cause.

Higher levels
High MCV (macrocytosis) suggests B12 or folate deficiency, alcohol use, or thyroid or liver issues.

Lower levels
Low MCV (microcytosis) most often reflects iron deficiency or thalassemia.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The average amount of hemoglobin packed into each red blood cell; helps classify the type of anemia.

Higher levels
High MCH is seen in macrocytic anemias, often from B12 or folate deficiency.

Lower levels
Low MCH points to iron-deficiency or other microcytic anemias, where cells carry too little hemoglobin.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The concentration of hemoglobin within red cells; helps distinguish types of anemia.

Higher levels
High MCHC is uncommon and can occur in hereditary spherocytosis or with certain lab interferences.

Lower levels
Low MCHC indicates under-hemoglobinized (hypochromic) cells, classically from iron deficiency.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

How much your red blood cells vary in size; helps pinpoint the cause of anemia and flags early nutrient deficiencies.

Higher levels
A high RDW means red cells vary widely in size, often an early clue to iron, B12, or folate deficiency or a mixed anemia.

Lower levels
A low or normal RDW indicates uniformly sized red cells.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Number of platelets in blood; low counts increase bleeding risk.

Higher levels
High platelet count (thrombocytosis) can reflect iron deficiency, inflammation, post-splenectomy, or myeloproliferative disease.

Lower levels
Low platelets (thrombocytopenia) increase bleeding risk; causes include ITP, drugs, liver disease, alcohol, marrow suppression.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The average size of your platelets; younger, larger platelets suggest the marrow is actively producing them.

Higher levels
High MPV means newer, larger platelets, often the marrow ramping up production in response to platelet loss.

Lower levels
Low MPV can indicate marrow production problems or certain inherited conditions.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of neutrophils, your most abundant white cell and first responder to bacterial infection.

Higher levels
A high neutrophil percentage commonly reflects bacterial infection, inflammation, stress, or steroid use.

Lower levels
A low neutrophil percentage can follow viral infection or marrow suppression and may raise infection risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of lymphocytes, the white cells (T, B, and NK cells) that run your adaptive immune response.

Higher levels
A high lymphocyte percentage often accompanies viral infections and some chronic immune conditions.

Lower levels
A low lymphocyte percentage can follow acute illness, steroid use, or immune suppression and may raise infection risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of monocytes, white cells that clear debris and become tissue macrophages during infection and healing.

Higher levels
Elevated monocytes can reflect chronic infection, inflammation, recovery from infection, or certain blood disorders.

Lower levels
Low monocytes may occur with acute stress, steroids, or marrow suppression.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of eosinophils, white cells that fight parasites and drive allergic inflammation.

Higher levels
Elevated eosinophils point to allergies, asthma, eczema, parasitic infection, drug reactions, or, rarely, blood disorders.

Lower levels
Low eosinophils are common with stress or steroid use and are not concerning.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of basophils, the rarest white cell, which release histamine in allergic and inflammatory reactions.

Higher levels
Elevated basophils can accompany allergies, chronic inflammation, or, rarely, blood disorders such as chronic myeloid leukemia.

Lower levels
Low basophils may occur with acute infection, stress, or thyroid overactivity and are usually not concerning.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Immunofluorescence-based ANA screen with automatic titer, pattern, and 11-antibody follow-up if positive.

Why it matters
Comprehensive autoimmune workup — useful given women's elevated risk for lupus, Sjögren's, scleroderma, and mixed connective tissue disease.

Higher levels
A positive ANA suggests autoimmune disease (lupus, Sjogren's, scleroderma, autoimmune hepatitis); higher titers and specific patterns increase the diagnostic weight.

Lower levels
A negative ANA makes systemic autoimmune disease less likely but doesn't rule it out.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

ESR — nonspecific inflammation marker.

Why it matters
Often elevated in autoimmune diseases that disproportionately affect women (lupus, RA, polymyalgia rheumatica).

Higher levels
Elevated ESR is a nonspecific marker of inflammation — rises with infection, autoimmune disease, malignancy, or even age.

Lower levels
Low ESR is generally benign; very low values can occur with polycythemia or sickle cell disease.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Older RA autoantibody; less specific than CCP but still part of the workup.

Why it matters
RA is 2–3x more common in women, often presenting during reproductive years.

Higher levels
High rheumatoid factor supports rheumatoid arthritis but also appears in Sjogren's, chronic infections, and aging.

Lower levels
A negative RF doesn't rule out rheumatoid arthritis (especially early disease) — CCP antibody is more specific.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Highly specific autoantibody for rheumatoid arthritis; often positive before symptoms appear.

Why it matters
RA is 2–3x more common in women, often presenting during reproductive years and affected by pregnancy and menopause.

Higher levels
A positive CCP antibody is highly specific for rheumatoid arthritis and can appear years before joint symptoms emerge.

Lower levels
A negative result doesn't rule out rheumatoid arthritis but lowers the probability.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Acute-phase protein that rises with inflammation, infection, or tissue damage.

Why it matters
Affects drug binding (especially in pregnancy) and can be elevated in inflammatory conditions more common in women.

Higher levels
Elevated alpha-1-acid glycoprotein indicates acute or chronic inflammation, infection, or trauma; it's a nonspecific acute-phase response.

Lower levels
Low values are uncommon and may reflect severe liver disease or protein loss.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Antiphospholipid antibody; persistently positive results suggest antiphospholipid syndrome (APS), a clotting disorder.

Why it matters
APS causes recurrent pregnancy loss, preeclampsia, and stillbirth — testing is essential in women with unexplained miscarriages.

Higher levels
Elevated IgG cardiolipin antibodies, especially when persistent, support a diagnosis of antiphospholipid syndrome — a clotting and pregnancy-loss disorder.

Lower levels
Low/negative values make antiphospholipid syndrome less likely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Acute-phase antiphospholipid antibody; combined with IgG helps diagnose antiphospholipid syndrome.

Why it matters
Part of recurrent miscarriage workup; APS is treatable with anticoagulation during pregnancy to improve live-birth rates.

Higher levels
Elevated IgM cardiolipin antibodies indicate recent immune activation; less specific than IgG for APS but still clinically meaningful.

Lower levels
Low/negative results lower the suspicion of antiphospholipid syndrome.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Celiac disease antibody; more useful than older anti-gliadin tests and especially helpful in IgA-deficient patients.

Why it matters
Celiac disease prevalence is higher in women and often presents as iron-deficiency anemia, infertility, or osteoporosis.

Higher levels
Elevated deamidated gliadin IgG supports a celiac disease diagnosis, especially in IgA-deficient patients.

Lower levels
Low/negative makes celiac less likely but doesn't rule out non-celiac gluten sensitivity.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Autoantibody specific for antisynthetase syndrome, a subset of inflammatory myositis with lung involvement.

Why it matters
Inflammatory myopathies disproportionately affect women; Jo-1+ disease has high pulmonary mortality if missed.

Higher levels
A positive Jo-1 antibody is highly specific for antisynthetase syndrome (a subset of polymyositis/dermatomyositis) with interstitial lung disease.

Lower levels
Low/negative makes antisynthetase syndrome unlikely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

First-line celiac disease antibody.

Why it matters
Celiac is 2–3x more common in women, often presenting with anemia, infertility, or recurrent miscarriage.

Higher levels
High tTG IgA is the most sensitive and specific marker for celiac disease — strongly supports the diagnosis.

Lower levels
Low/negative tTG IgA makes celiac unlikely (unless the patient has IgA deficiency, which requires the IgG version).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

IgG version used when patient is IgA-deficient.

Why it matters
Important alternative for the ~1 in 500 women with selective IgA deficiency.

Higher levels
High tTG IgG supports a celiac diagnosis, especially in patients with IgA deficiency.

Lower levels
Low/negative tTG IgG with normal IgA makes celiac less likely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Acute-phase protein that rises with systemic inflammation.

Why it matters
Often elevated in autoimmune flares (lupus, RA) which are more prevalent in women, and during pregnancy complications like preeclampsia.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Bone resorption marker that shows how fast bone is being broken down.

Why it matters
Critical for monitoring osteoporosis treatment in postmenopausal women and assessing fracture risk.

Higher levels
High CTx reflects accelerated bone resorption — seen in postmenopausal osteoporosis, hyperthyroidism, hyperparathyroidism, or untreated bone disease.

Lower levels
Low CTx indicates suppressed bone breakdown — common with bisphosphonate therapy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Parathyroid hormone — regulates calcium and bone metabolism.

Why it matters
Hyperparathyroidism is more common in postmenopausal women and accelerates osteoporosis; key bone workup component.

Higher levels
High PTH with high calcium suggests primary hyperparathyroidism; high PTH with low/normal calcium points to vitamin D deficiency or chronic kidney disease.

Lower levels
Low PTH with high calcium suggests malignancy, granulomatous disease, or vitamin D toxicity; low PTH with low calcium indicates hypoparathyroidism.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Bone formation marker (P1NP); rises with new bone formation.

Why it matters
Standard for monitoring response to osteoporosis treatment in postmenopausal women alongside CTx.

Higher levels
High P1NP indicates accelerated bone formation — seen in adolescent growth, fracture healing, Paget's disease, or response to anabolic osteoporosis therapy.

Lower levels
Low P1NP suggests reduced bone formation — common with bisphosphonate therapy and age-related bone loss.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Fat-soluble vitamin essential for clotting and bone health.

Why it matters
Important for bone health in postmenopausal women and for preventing newborn hemorrhagic disease.

Higher levels
High vitamin K typically reflects supplementation; not toxic.

Lower levels
Low vitamin K impairs blood clotting and bone metabolism; common with fat malabsorption, prolonged antibiotic use, or warfarin therapy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Antibody class found in mucosal surfaces; low levels suggest IgA deficiency which affects celiac testing.

Why it matters
Selective IgA deficiency is more common in women and must be screened before celiac testing to avoid false negatives.

Higher levels
High IgA points to chronic infections, autoimmune disease (IgA nephropathy, celiac with IgA elevation), liver disease, or multiple myeloma.

Lower levels
Selective IgA deficiency is the most common primary immunodeficiency — often asymptomatic but raises infection and autoimmune risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Antibody mediating allergic reactions; total IgE rises in allergy, asthma, and parasitic infection.

Why it matters
Allergic disease is more common in adult women; baseline helpful in evaluating chronic urticaria, asthma, and eczema.

Higher levels
Elevated IgE indicates allergic disease, atopy, parasitic infection, or rare disorders like hyper-IgE syndrome.

Lower levels
Low IgE is generally benign.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Main antibody class; reflects long-term immune memory and immune competence.

Why it matters
Low IgG affects vaccine response and infection risk; key in preconception/pregnancy planning, especially with autoimmune disease.

Higher levels
High total IgG suggests chronic infection, autoimmune disease, chronic liver disease, or monoclonal gammopathy/multiple myeloma.

Lower levels
Low IgG points to primary immunodeficiency (CVID), protein-losing states, or immunosuppressive therapy.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Mast cell enzyme; elevated in mastocytosis, anaphylaxis, and mast cell activation syndrome.

Why it matters
MCAS is more common in women and can present with cyclical symptoms, GI issues, and pregnancy intolerance.

Higher levels
Elevated tryptase indicates mast cell activation — anaphylaxis acutely, mastocytosis or mast cell activation syndrome chronically.

Lower levels
Low tryptase is normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Detects past or chronic exposure to Candida yeast.

Why it matters
Recurrent vaginal candidiasis affects ~10% of women; can help identify chronic mucocutaneous candidiasis or immune deficiency.

Higher levels
Elevated IgG suggests current or past systemic candida overgrowth and ongoing immune response to it.

Lower levels
Low/negative values mean no significant immune memory to candida — though gut overgrowth can still occur.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Detects recent or active CMV infection.

Why it matters
CMV is the most common congenital infection in the U.S.; primary infection during pregnancy can cause severe fetal complications.

Higher levels
Elevated CMV IgM points to acute or recent CMV infection.

Lower levels
Low/negative IgM rules out recent CMV infection but doesn't comment on past exposure.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Marker of active or recently active EBV infection; elevated in chronic active EBV.

Why it matters
Increasingly linked to autoimmune diseases (especially MS and lupus) that disproportionately affect women.

Higher levels
Positive EBV early antigen IgG suggests active or recently reactivated EBV infection — relevant in chronic fatigue investigations.

Lower levels
Low/negative indicates no current EBV reactivation, though past exposure is still likely.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Two-tier Lyme disease testing — screening assay with confirmatory Western blot.

Why it matters
Chronic Lyme symptoms (fatigue, joint pain) overlap with autoimmune disease, which is more common in women — accurate testing is key.

Higher levels
A positive Lyme antibody screen with confirmatory Western blot suggests prior or current Borrelia infection.

Lower levels
Negative results make Lyme unlikely but don't rule it out in very early infection (testing too soon).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Confirms immunity to rubella (German measles).

Why it matters
Critical preconception test — rubella infection in pregnancy causes severe congenital defects; non-immune women should be vaccinated before conception.

Higher levels
A positive (immune) rubella IgG means you're protected from rubella through prior vaccination or natural infection.

Lower levels
A negative (non-immune) result means no protection — pregnancy carries risk of congenital rubella syndrome if exposed.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Measures recent arsenic exposure from water, food, or occupational sources.

Why it matters
Arsenic crosses the placenta and is linked to pregnancy loss, low birth weight, and developmental issues — relevant for women of childbearing age.

Higher levels
Elevated blood arsenic reflects recent exposure — typically through contaminated water, seafood (often organic, less toxic), or industrial sources.

Lower levels
Low arsenic is the desired baseline; no clinical concerns.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Toxic heavy metal from smoking, food, and industrial exposure that accumulates in kidneys and bones.

Why it matters
Crosses the placenta, increases osteoporosis and breast cancer risk in women, and is concentrated in cigarettes.

Higher levels
Elevated cadmium reflects exposure from tobacco smoke, contaminated food, or industrial sources; chronic accumulation damages kidneys and bones.

Lower levels
Low cadmium is the desired baseline.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Toxic heavy metal that crosses the placenta and is stored in bone.

Why it matters
Lead is mobilized from bones during pregnancy and lactation, exposing the fetus and infant — screening matters before and during pregnancy.

Higher levels
Elevated blood lead, even at low levels, impairs cognition (especially in children), raises blood pressure, and damages kidneys.

Lower levels
Low blood lead is the desired baseline.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Toxic metal from fish consumption and dental amalgams; methylmercury crosses the placenta.

Why it matters
FDA limits fish intake in pregnancy due to fetal neurodevelopment risk; testing is informative for women planning pregnancy.

Higher levels
Elevated mercury reflects exposure from large predatory fish (tuna, swordfish), dental amalgams, or industrial sources.

Lower levels
Low mercury is the desired baseline.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Identifies ABO blood type (A, B, AB, or O).

Why it matters
Essential prenatally for ABO-incompatibility risk in newborns and to prepare for any transfusion need during delivery.

Higher levels
ABO is a categorical result (A, B, AB, or O) rather than a high/low value.

Lower levels
Not applicable — blood type is categorical, not quantitative.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Muscle enzyme used to evaluate inflammatory muscle disease like polymyositis and dermatomyositis.

Why it matters
Dermatomyositis is more common in women and can present with muscle weakness, rash, and elevated cancer risk.

Higher levels
Elevated aldolase reflects skeletal-muscle damage from polymyositis, dermatomyositis, muscular dystrophy, or rhabdomyolysis.

Lower levels
Low aldolase is not clinically meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Screens for red blood cell antibodies that could cause transfusion reactions or hemolytic disease of the newborn.

Why it matters
Critical in pregnancy — Rh and other antibodies can attack the fetus's red cells (e.g., Rh disease) requiring monitoring or RhoGAM.

Higher levels
A positive screen flags unexpected red-cell antibodies — important for transfusion safety and pregnancy management.

Lower levels
A negative screen means no clinically significant RBC antibodies were detected.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Enzyme released from damaged muscle; evaluates muscle injury, statin myopathy, and inflammatory myopathies.

Why it matters
Helpful in evaluating muscle pain in women on statins (often dose-sensitive due to smaller body size) and autoimmune myositis.

Higher levels
Elevated CK signals muscle injury — heavy exercise, statin myopathy, rhabdomyolysis, polymyositis, or (CK-MB) heart attack.

Lower levels
Low CK is generally benign and seen with low muscle mass or steroid use.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Hormone that stimulates stomach acid; elevated in Zollinger-Ellison syndrome and on acid-suppressing medications.

Why it matters
Long-term PPI use is more common in women and raises gastrin — relevant when evaluating chronic reflux or B12 absorption.

Higher levels
Markedly elevated gastrin can indicate Zollinger-Ellison syndrome (gastrinoma), atrophic gastritis, pernicious anemia, or PPI use.

Lower levels
Low gastrin is uncommon and not typically clinically actionable.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Screens for sickle hemoglobin (HbS).

Why it matters
Standard preconception/prenatal test for women with African, Mediterranean, or Middle Eastern ancestry to assess carrier status.

Higher levels
A positive sickle cell screen indicates sickle cell trait or disease — confirmation with hemoglobin electrophoresis is needed.

Lower levels
A negative result rules out sickle cell disease/trait.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of immature (band) neutrophils in your blood, an early sign the body is mobilizing to fight an infection.

Higher levels
A high absolute band count points to an active bacterial infection or significant inflammation.

Lower levels
Low values are normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of basophils, white cells that drive histamine release in allergic and inflammatory responses.

Higher levels
A high absolute basophil count can signal allergy, chronic inflammation, or a myeloproliferative disorder.

Lower levels
Low values are common and rarely meaningful.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of blasts (immature precursor cells) in blood, normally zero since these cells belong in the marrow.

Higher levels
A measurable blast count is abnormal and can point to leukemia or another marrow disorder requiring urgent evaluation.

Lower levels
Zero is the normal result.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of eosinophils, white cells involved in allergic responses and parasite defense.

Higher levels
A high absolute eosinophil count suggests allergy, asthma, parasitic infection, or a drug reaction.

Lower levels
Low values are normal, often reflecting stress or steroid effect.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of lymphocytes, the white cells central to fighting viruses and building long-term immunity.

Higher levels
A high absolute lymphocyte count typically reflects a viral infection or, less often, a lymphoproliferative disorder.

Lower levels
A low count (lymphopenia) can result from acute illness, steroids, or immune suppression and increases infection risk.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of metamyelocytes (immature neutrophil precursors), normally zero in circulating blood.

Higher levels
A measurable count indicates the marrow is releasing immature cells in response to severe infection or a marrow disorder.

Lower levels
Zero is normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of monocytes, white cells that engulf pathogens and support immune cleanup and repair.

Higher levels
A high absolute monocyte count suggests chronic infection or inflammation, or, less often, a blood disorder.

Lower levels
Low values can accompany marrow suppression or steroid use.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of myelocytes (immature granulocyte precursors), normally zero in blood.

Higher levels
A measurable count signals the marrow is releasing immature cells, seen in severe infection or marrow disease.

Lower levels
Zero is the normal result.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of neutrophils, the key value (the ANC) for gauging the body's ability to fight bacterial infection.

Higher levels
A high absolute neutrophil count indicates infection, inflammation, or physiologic stress.

Lower levels
A low count (neutropenia) increases infection risk and can result from viral illness, medications, or marrow problems.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of immature, nucleated red blood cells in circulation, normally absent in adults.

Higher levels
A measurable count points to marrow stress from severe anemia, low oxygen, or marrow infiltration.

Lower levels
Zero is normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The absolute number of promyelocytes (early granulocyte precursors), normally zero in blood.

Higher levels
A measurable count can signal severe marrow stress or leukemia and needs prompt review.

Lower levels
Zero is the normal result.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The ratio of albumin to all other blood proteins (globulins); helps interpret total protein and flag liver, kidney, or immune disorders.

Higher levels
A high A/G ratio usually reflects low globulins, seen in some immune deficiencies or genetic conditions.

Lower levels
A low A/G ratio points to either low albumin (liver disease, malnutrition) or high globulins (chronic inflammation, infection, or a disorder like multiple myeloma).

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of young, immature neutrophils (bands) among your white cells; a rise (a 'left shift') means the marrow is rushing out cells to fight infection.

Higher levels
A high band percentage (left shift) suggests acute bacterial infection or inflammation as the marrow releases immature neutrophils.

Lower levels
Low or absent bands are normal and not a concern.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of blasts, very immature precursor cells that should stay in the bone marrow; their appearance in blood always warrants attention.

Higher levels
Any blasts in the blood are abnormal and can indicate a serious marrow disorder such as leukemia; prompt hematology review is needed.

Lower levels
Zero blasts is the normal, expected result.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The ratio of two kidney waste products; helps tell whether a rise in kidney markers comes from dehydration versus kidney damage.

Higher levels
A high BUN/creatinine ratio usually points to dehydration or reduced blood flow to the kidneys (or GI bleeding).

Lower levels
A low ratio can reflect liver disease, low protein intake, or overhydration.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

All blood proteins other than albumin, including antibodies and transport proteins; reflects immune activity and inflammation.

Higher levels
High globulins occur with chronic infection or inflammation, autoimmune disease, or blood disorders such as multiple myeloma.

Lower levels
Low globulins can signal an immune deficiency or protein loss through the kidneys or gut.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of metamyelocytes, immature neutrophil precursors not normally seen in blood; their appearance signals marrow stress.

Higher levels
Metamyelocytes in the blood (a left shift) suggest severe infection, inflammation, or a marrow disorder.

Lower levels
Absent metamyelocytes is the normal result.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of myelocytes, immature granulocyte precursors normally confined to the marrow.

Higher levels
Myelocytes in the blood indicate a marked left shift from severe infection, inflammation, or a marrow disorder.

Lower levels
Absent myelocytes is normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

Immature red blood cells that still contain a nucleus, expressed per 100 white cells; rarely seen in healthy adults.

Higher levels
Nucleated red cells in the blood suggest the marrow is under stress, from severe anemia, low oxygen, or a marrow disorder.

Lower levels
Zero nucleated red cells is the normal result for adults.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of promyelocytes, early granulocyte precursors that belong in the marrow, not the bloodstream.

Higher levels
Promyelocytes in the blood indicate a significant left shift or a marrow disorder such as acute promyelocytic leukemia.

Lower levels
Absent promyelocytes is normal.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.

The percentage of reactive (atypical) lymphocytes, normal lymphocytes that look enlarged while responding to infection.

Higher levels
Elevated reactive lymphocytes are classic for viral infections such as mononucleosis (EBV) and other viral illnesses.

Lower levels
Few or no reactive lymphocytes is the normal state.

How to prepare
Follow the fasting and timing instructions sent with your lab order. Preparation depends on your full selection.

These notes provide context and do not diagnose a condition.