Objective:To estimate the number of spermatids generated by one primary spermatocyte and thus evaluate the efficiency of meiosis during spermatogenesis in normal adult men.

• 目的：估计正常成人精子发生的成熟分裂过程中一个初级精母细胞实际形成了多少个精子细胞，从而评价成熟分裂的效率。