SYCP3 and Sertoli Cell-Only Syndrome: The expression of SYCP3 wasnot seen in patients with testicular atrophy, Sertoli cell-only syndrome, or arrest of spermatogonial stem cells.In the current study, spermatogonial stem cells couldproliferate and initiate meiosis, but spermatocytes didnot complete spermiogenesis to produce functionalsperms.