Anti-Müllerian hormone (AMH) is a protein produced by the ovaries in females and the testes in males. In females, AMH plays a crucial role in the development of ovarian follicles, which are essential for fertility. It helps regulate the growth of these follicles and indicates the remaining egg supply. In males, AMH is involved in the development of the male reproductive system during fetal growth. It prevents the formation of female reproductive structures. Measuring AMH levels can provide insights into reproductive health, including ovarian reserve in women and testicular function in men.