Spermatogenesis is a complex and very efficient process that begins with the division and differentiation of the spermatogenic stem cell within the seminiferous tubule of the testis.

• 精子发生是一个复杂的过程，涉及到由精原细胞转化为初级精母细胞的有丝分裂过程，又经历了从初级精母细胞形成精子细胞的减数分裂过程，最后精子细胞经过变态形成精子。