The biology of human male reproduction: an overview.

In this overview, the focus is on the biology of human male reproduction. The structure and function of the testis are described, and the endocrine control of spermatogenesis is discussed. The formation of spermatozoa during spermatogenesis and their maturation in the epididymis are reviewed. The physiology of ejaculation and sperm transport in the female tract are discussed. Sperm capacitation, the acrosome reaction, and fertilization of human gametes are also reviewed.