Follicle Stimulating Hormone (FSH) LabCorp

Follicle Stimulating Hormone is a hormone secreted by the pituitary (along with Luteinizing Hormone/LH) and is useful in distinguishing primary gonadal failure from secondary (hypothalamic/pituitary) causes of gonadal failure, menstrual disturbances, and amenorrhea. Excessive FSH and LH levels are found in hypogonadism, anorchia, gonadal failure, complete testicular feminization syndrome, menopause, Klinefelter syndrome, alcoholism, and castration. This test is useful in defining menstrual cycle phases in the evaluation of infertility in women and testicular dysfunction in men. FSH is commonly tested with LH, both of which are gonadotropins. FSH and LH are typically low in hypothalamic and pituitary failure, while they are both typically high in those going through menopause.