Follicle Stimulating Hormone (FSH)
- Sample Type
- Standard
- Fasting
- No
- Unit
- mIU/mL
FSH is a pituitary glycoprotein essential for reproductive function. In females, it stimulates the growth of ovarian follicles and the secretion of estrogen. In males, it acts on Sertoli cells to support spermatogenesis. FSH is the primary laboratory marker used to diagnose menopause, primary ovarian insufficiency, and male infertility.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
FSH levels are highly variable. In perimenopausal women, FSH can swing from normal to high within a single month. Recent use of hormone replacement therapy (HRT) or oral contraceptives will suppress FSH, making the test unreliable for evaluating underlying ovarian reserve.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Follicle Stimulating Hormone (FSH):
Official Sources
Research & Guidelines
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Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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