What is the primary function of luteinizing hormone (LH)?

The primary function of luteinizing hormone (LH) is to trigger ovulation and stimulate testosterone production. In females, LH plays a crucial role in regulating the menstrual cycle; it surges to cause the release of an egg from the ovary, a process known as ovulation. In males, LH stimulates the Leydig cells in the testes to produce testosterone, which is essential for the development of male reproductive tissues and the maintenance of secondary sexual characteristics.

This dual role in both male and female reproductive systems highlights LH's importance in sexual development and reproductive health. Understanding LH's functions can provide insights into various conditions related to fertility and hormonal balance, making it a vital hormone in endocrinology and reproductive medicine.