spermatogenesis

In humans and other mammals the spermatogenesis it is the male gametogenesis, that is, the process of maturation of the male germ cells[1] which occurs in the seminiferous tubules of the testes. It begins when the individual has reached puberty[2], thanks to the stimulation of the hormones FSH and testosterone[3][4].
Spermatogenesis process
It is the analogue of oogenesis for women, but differs from this mainly in terms of timing since the production of spermatozoa begins at puberty and lasts for the entire life of the individual while oogenesis begins before birth but is then interrupted and resumed once the individual has sexually matured and ends at menopause[2]. Spermatogenesis is not to be confused with spermiogenesis which is the third and final phase of spermatogenesis itself in which the final differentiation takes place which leads to the development of mature spermatozoa[5]. At the end of spermatogenesis only 80% of the spermatozoa are normal, the remaining 20% ​​are made up of functionally or morphologically abnormal spermatozoa[6].