<P> Spermatozoa are the mature male gametes in many sexually reproducing organisms . Thus , spermatogenesis is the male version of gametogenesis , of which the female equivalent is oogenesis . In mammals it occurs in the seminiferous tubules of the male testes in a stepwise fashion . Spermatogenesis is highly dependent upon optimal conditions for the process to occur correctly , and is essential for sexual reproduction . DNA methylation and histone modification have been implicated in the regulation of this process . It starts at puberty and usually continues uninterrupted until death , although a slight decrease can be discerned in the quantity of produced sperm with increase in age ( see Male infertility ) . </P>
<P> Spermatozoa are the mature male gametes in many sexually reproducing organisms . Thus , spermatogenesis is the male version of gametogenesis , of which the female equivalent is oogenesis . In mammals it occurs in the seminiferous tubules of the male testes in a stepwise fashion . Spermatogenesis is highly dependent upon optimal conditions for the process to occur correctly , and is essential for sexual reproduction . DNA methylation and histone modification have been implicated in the regulation of this process . It starts at puberty and usually continues uninterrupted until death , although a slight decrease can be discerned in the quantity of produced sperm with increase in age ( see Male infertility ) . </P>
when does spermatogenesis begin what causes it to begin
when does spermatogenesis begin what causes it to begin
puberty
puberty