Changes

==Introduction==

==Introduction==

Unlike the female production of gametes which occurs entirely before birth with gamete maturation occurring in a pulsatile fashion after puberty, male individuals produce gametes continuously from puberty onwards for the rest of their reproductive lives and the release of the gametes is constant. Spermatogenesis is the process of producing sperm, and it occurs in three phases:

Unlike the female production of gametes which occurs entirely before birth with gamete maturation occurring in a pulsatile fashion after puberty, male individuals produce gametes continuously from puberty onwards for the rest of their reproductive lives and the release of the gametes is constant. Spermatogenesis is the process of the gradual transformation of germ cells into spermatozoa. It occurs mainly within the  seminiferous tubules of the testes and can be divided into three phases, each of which is associated with different germ cell types:

*Proliferative phase

 

*Meiotic phase

*Proliferative phase - spermatogonia

*Differentiation phase / spermiogenesis

*Meiotic phase - spermatocytes

*Differentiation phase / spermiogenesis - spermatids

==The Spermatogenic Cycle==

==The Spermatogenic Cycle==