male gametes play a critical role in transmitting hereditary information to the offspring. Gametogenesis, especially spermatogenesis, is a complicated differentiation process including mitosis and meiosis. However, for lack of an efficient and reproducible model, the mechanism of male germ development is not yet clear. Researches on stem cells'differentiation into male gametes in vitro will promote the study of germ cell development and even reproductive biology. This article updates the researches on the culture of primordial germ cells and stem cells' differentiation into male gametes.