Information about a laboratory test
Low FSH may occur with pituitary or hypothalamic dysfunction; sex and menstrual-cycle phase strongly affect interpretation.
Measures FSH, a pituitary hormone involved in ovarian and testicular function, sexual development, and reproduction.
Used in infertility, menstrual disorders, menopause, early or delayed puberty, and evaluation of ovarian or testicular function.
Low FSH may occur with pituitary or hypothalamic dysfunction; sex and menstrual-cycle phase strongly affect interpretation.
High FSH is physiologic after menopause; in reproductive-age adults it can provide information about ovarian or testicular function depending on context.
Use the reference interval printed on your own laboratory report first. Hormone results may vary with the assay, age, sex, pregnancy, menstrual-cycle phase, and sampling time.
>= 1.5 – <= 12.4 mIU/mL
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
>= 4.7 – <= 21.5 mIU/mL
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
>= 25.8 – <= 134.8 mIU/mL
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.
FSH is usually interpreted with LH and, depending on sex, estradiol/progesterone or testosterone. A single female range cannot represent every cycle phase.
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