What is the function of follicle-stimulating hormone (FSH) in males?

• A. It inhibits testosterone production.
• B. It stimulates spermatogenesis.
• C. It increases estrogen levels.
• D. It regulates water retention.

Answer: (B)

Follicle-stimulating hormone (FSH) plays a pivotal role in male reproductive physiology primarily by stimulating spermatogenesis, which is the process of sperm cell development within the testes. FSH acts on Sertoli cells in the seminiferous tubules, promoting the nourishment and maturation of sperm cells. This action is crucial for male fertility, as spermatogenesis is necessary for the production of viable sperm.

While FSH is involved in the reproductive system, its specific function does not include inhibiting testosterone production, increasing estrogen levels, or regulating water retention, as those roles are fulfilled by other hormones within the endocrine system. Understanding the function of FSH in stimulating spermatogenesis helps clarify its essential contribution to male reproductive health and fertility.