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Follicle-stimulating hormone (FSH) blood test

  Follicle-stimulating hormone (FSH) blood test The follicle stimulating hormone (FSH) blood test measures the level of FSH in blood. FSH is a hormone released by the pituitary gland, located on the underside of the brain Normal Results Normal FSH levels will differ, depending on a person's age and sex. Male: Before puberty: 0 to 5.0 mIU/mL (0 to 5.0 IU/L) During puberty: 0.3 to 10.0 mIU/mL (0.3 to 10.0 IU/L) Adult: 1.5 to 12.4 mIU/mL (1.5 to 12.4 IU/L) Female: Before puberty: 0 to 4.0 mIU/mL (0 to 4.0 IU/L) During puberty: 0.3 to 10.0 mIU/mL (0.3 to 10.0 IU/L) Women who are still menstruating: 4.7 to 21.5 mIU/mL (4.5 to 21.5 IU/L) After menopause: 25.8 to 134.8 mIU/mL (25.8 to 134.8 IU/L) High FSH levels in women may be present: During or after menopause, including premature menopause When receiving hormone therapy Due to certain types of tumor in the pituitary gland Due to Turner syndrome Low FSH levels in women may be present due to: Being very underweight or having had recent r