Follicle-Stimulating Hormone and Luteinizing Hormone Assay
(FSH and LH Assay)
FSH and LH are produced by the pituitary gland, and are necessary for normal ovulation and the production of estrogen in women. FSH and LH are also necessary for the development of Sertoli cells and the production of testosterone in men. Decreased FSH and LH levels can lead to menstrual abnormalities or fertility problems. Blood levels are measured to determine the stage of menopause, in men with enlarged breast tissue (gynecomastia), early or delayed puberty, and as tumor markers for ovarian cancer. Blood levels are also used to determine whether abnormal hormone levels are due to ovarian or testicular problems, or pituitary problems. Since LH levels rise approximately 24 hours before ovulation and are very easily detected in the urine, tests have been developed to measure the presence of LH as an aid in determining the highest period of fertility.
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