Type A spermatogonia 0.466 ± 0.025 0.543 ± 0.040 0.591 ± 0.029⁎
Spermatocyte I in the preleptotene phase 27.877 ± 0.943 23.449 ± 1.193* 26.671 ± 1.097
Spermatocyte I in the pachytene phase 29.135 ± 1.503 33.095 ± 1.312 33.092 ± 0.910
Round spermatids 87.566 ± 2.851 93.534 ± 2.982 89.298 ± 1.651
Sertoli cell nucleolus