What role does follicle-stimulating hormone (FSH) play in male reproductive systems?

Follicle-stimulating hormone (FSH) plays a crucial role in male reproductive health primarily by stimulating sperm production in the testes. In males, FSH acts on the Sertoli cells, which are essential for nurturing the developing sperm cells during the spermatogenesis process. This hormone promotes the growth and maturation of these cells and is vital for the proper formation of sperm.

While testosterone is significant for male reproductive functions, this hormone's production is primarily stimulated by luteinizing hormone (LH), not FSH. FSH does not directly regulate libido; that function is more closely associated with testosterone levels and other factors. Additionally, FSH does not inhibit spermatogenesis; instead, it is a key promoter of this essential process in male fertility.