Inhibin is a hormone produced mainly by the ovaries in females and the testes in males. Its primary function is to regulate the production of follicle-stimulating hormone (FSH) by the pituitary gland. By controlling FSH levels, inhibin plays a key role in the regulation of reproductive processes such as egg development in women and sperm production in men. There are two types of inhibin, A and B, each with specific roles depending on the phase of the reproductive cycle.