FSH (Follicle Stimulating Hormone) is one of the gonadotrophins secreted by the pituitary gland. Along with LH, it stimulates gonadal activity and is therefore classified as a gonadotrophic hormone.

In males, FSH works in conjunction with androgens to regulate the process of spermatogenesis (formation of spermatozoa). This coordination is essential for proper male reproductive function.

In females, FSH stimulates the growth and development of the ovarian follicles. This action is crucial for the maturation of follicles in the ovary, which is necessary for the female reproductive cycle.