Follicle Stimulating Hormone (FSH) – Blood Test

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Follicle stimulating hormone (FSH) is a sex hormone produced in the pituitary gland. In women, increased levels of FSH are associated with menopause or a decrease in ovarian function. Increased or decreased FSH levels are also associated with a variety of glandular conditions.


Follicle stimulating hormone stimulates the growth of ovarian follicles and the production of estradiol during the first half of the menstrual cycle. In the male, it stimulates the epithelium of the seminiferous tubules and is partially responsible for inducing spermatogenesis. Increased levels of FSH are associated with menopause and primary ovarian hypofunction in females, primary hypogonadism in males, alcoholism, castration, and Turner’s and Klinefelter’s syndromes.Decreased FSH levels are associated with secondary or tertiary gonadal failure in females and males caused by anorexia nervosa, hemochromatosis, and/or pituitary tumors. They are also decreased in patients treated with estrogens or androgens