Luteinizing hormone: Learn about luteinizing hormone

Learn about luteinizing hormone (LH), its role in fertility, testosterone production, and ovulation. Discover how LH levels impact reproductive health and testing options. Learn about the Luteinizing Hormone Test, a blood test that measures the level of LH, a hormone involved in reproductive function. Find out how to prepare for the test, what the normal range is, and what abnormal results mean for men and women. Luteinizing hormone (LH) is a gonadotropin produced in the pituitary gland, located in the brain, and plays an essential role in the reproductive system of both men and women. Together with follicle stimulating hormone (FSH), LH helps to regulate hormonal balance and reproductive function from puberty onwards: In males, its main function is to stimulate the production of testosterone in the testes, a process known as steroidogenesis. In females, LH promotes the production of androgens in the ... 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.