NORMAL VALUES FOR LABORATORY TEST RESULTS
This table lists normal values for laboratory and selected diagnostic test results used throughout the 2022 In-Training Examination
and is included as a general guideline for examinees. Although actual normal values may vary by geographic location, institution,
or laboratory, the values below represent the standard reference ranges for the purpose of this examination. The values are specific
for adults or women, if relevant, unless otherwise noted.
ANALYTE REFERENCE RANGE
Chemistry (Blood, Plasma, Serum)
Alanine aminotransferase 7–41 U/L
Ammonia, as NH
3
19–60 mcg/dL
Antimüllerian hormone 0–6.9 ng/mL
Aspartate aminotransferase 12–38 U/L
CA 125 <35 U/mL
Carcinoembryonic antigen
Nonsmoker <2.5 ng/mL
Smoker <5 ng/mL
Creatinine 0.6–1.2 mg/dL
Dehydroepiandrosterone sulfate 60–340 mcg/dL
Estradiol
Nonpregnant <20–443 pg/mL
Ferritin 10–120 ng/mL
Follicle-stimulating hormone
Follicular phase 3–15 mIU/mL
Midcycle peak 15–35 mIU/mL
Luteal phase 3–15 mIU/mL
Child 0.1–7 mIU/mL
Postmenopausal 24–170 mIU/mL
Glucose, random 65–139 mg/dL
β-hCG
Nonpregnant <5 mIU/mL
Pregnant >5 mIU/mL
17α-Hydroxyprogesterone 20–300 ng/dL
Inhibin B
Premenopausal 2–80 pg/mL
Postmenopausal <5 pg/mL
Lactic acid 0.6–1.7 mmol/L
Luteinizing hormone
Follicular phase 2–15 mIU/mL
Midcycle peak 22–105 mIU/mL
Luteal phase 0.6–19 mIU/mL
Child 0.5–10.3 mIU/mL
Postmenopausal 16–64 mIU/mL
Magnesium, pregnant 1.1-2.2 mg/dL
Potassium 3.5–5.3 mEq/L
Progesterone
Follicular phase <1 ng/mL
Midcycle peak 0.8–2 ng/mL
Luteal phase 3–20 ng/mL
First trimester 8–48 ng/mL
Second trimester 16–146 ng/mL
ANALYTE REFERENCE RANGE
Chemistry (Blood, Plasma, Serum)
Progesterone (continued)
Third trimester 55–255 ng/mL
Postmenopausal <0.5 ng/mL
Prolactin
Follicular phase 8–20 ng/mL
Midcycle peak 0–22 ng/mL
Luteal phase 10–30 ng/mL
Postmenopausal 8–25 ng/mL
Pregnant 34–386 ng/mL by third trimester
Testosterone
Total 6–86 ng/dL
Pregnant 3–4× normal
Postmenopausal ½ of normal
Free 3–19 pg/mL
Thyroid-stimulating hormone 0.34–4.25 mIU/L
Thyroxine, free 0.8–1.7 ng/dL
Uric acid 2.5–5.6 mg/dL
Chemistry (Urine)
24-hour free cortisol excretion 4–40 mcg/24 h
24-hour protein excretion <150 mg/24 h
Creatinine clearance 91–130 mL/min
Protein to creatinine ratio <0.2
Hematology and Coagulation
Fibrinogen
Third trimester 301–696 mg/dL
Hematocrit 35–44%
Hemoglobin
Nonpregnant 12–15 g/dL
Third trimester 9.5–15 g/dL
Hemoglobin A
1c
4–5.6%
Mean corpuscular volume 80–100 fL
Platelets
Nonpregnant 165,000–415,000 cells/mm
3
First trimester 174,000–391,000 cells/mm
3
Second trimester 155,000–409,000 cells/mm
3
Third trimester 146,000–429,000 cells/mm
3
White blood cells, total 3,500–9,100 cells/mm
3
