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Interpret Your Follicle Stimulating Hormone Results
Enter your FSH value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
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Follicle Stimulating Hormone Normal Ranges
FSH is a gonadotropin hormone secreted by the anterior pituitary gland.
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Female | 3.5 – 12.5 | mIU/mL | Follicular phase (day 2–3 of cycle) |
| Adults (18–64) | Female | 4.7 – 21.5 | mIU/mL | Ovulatory peak |
| Adults (18–64) | Female | 25.8 – 134.8 | mIU/mL | Post-menopause |
| Adults (18–64) | Male | 1.5 – 12.4 | mIU/mL | — |
Also reported in: IU/L.
Common Causes of High FSH
Menopause (normal physiological rise)Premature ovarian insufficiency (POI) — in women <40Primary testicular failure (Klinefelter syndrome, chemotherapy damage)
Common Causes of Low FSH
Hypogonadotropic hypogonadism (pituitary or hypothalamic failure)Hyperprolactinemia (prolactin suppresses GnRH and FSH)Severe caloric restriction or eating disorders
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