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A luteinizing hormone test measures how much LH is in your blood. LH helps your reproductive system and is linked to ovulation, puberty, and fertility. Learn why you might need this test, how to prepare for it, and what the normal and abnormal levels mean. Learn about luteinizing hormone (LH), its role in fertility, testosterone production, and ovulation. Discover how LH levels impact reproductive health and testing options. Luteinizing hormone (LH) is a glycoprotein hormone produced by the pituitary gland that regulates reproductive functions in males and females. Learn about its structure, genes, function, effects, and clinical significance. Luteinizing hormone (LH) is a gonadotropin secreted by the pituitary gland through the action of GnRH. Its main function is to regulate the male and female reproductive cycle together with other hormones such as FSH.
