Luteinizing hormone: Learn about the Luteinizing Hormone Test

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 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. Find out the role of luteinizing hormone in fertility and how you can test for it at home or at a clinic. Take control of your fertility with Natural Cycles.