摘要
Spermatogenesis refers to the process by which the production and development of the spermatozoa （the mature male gamete of most sexually reproducing species） occurs. It is a complex, stepwise process of sperm development, taking more than a month depending upon the species involving three specific functional phases： spermatogonial proliferation, meiosis and metamorphosis.1 Investigators have been successful in recreating this process in some species of fish; however, this whole process has never been reproduced in vitro in mammals.
Spermatogenesis refers to the process by which the production and development of the spermatozoa （the mature male gamete of most sexually reproducing species） occurs. It is a complex, stepwise process of sperm development, taking more than a month depending upon the species involving three specific functional phases： spermatogonial proliferation, meiosis and metamorphosis.1 Investigators have been successful in recreating this process in some species of fish; however, this whole process has never been reproduced in vitro in mammals.
