CORE TOPIC:PAGE 2 of 4
Spermatocytogenesis

The process of spermatogenesis begins with mitotic proliferation of the most primitive germ cells, spermatogonia. These cells, which lie in contact with the basement membrane of the seminiferous tubules, begin mitotic activity at puberty, ensuring an unlimited number of spermatozoa throughout life. Three major types of spermatogonia have recognised:

  • Type A

  • Intermediate Type I

  • Type B

    Type A spermatogonia can develop in two ways; either they remain as stem cells and continue to divide mitotically, or they differentiate through progressive divisions, first into an intermediate type I and then into type B spermatogonia. Type B enter prophase of meiosis and become primary spermatocytes.

    Spermatogenesis
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