Objective: To investigate the effects of big and bit Y chromosome configurations on male fertility and to evaluate the relevant clinical significance. Methods: The relevant cases were divided into A and B groups. Group A included male infertile cases. Group B included cases whose wives had adverse pregnancy history or the abnormal amniotic fluid punctures. The cytogenetics of the patients were examined by culturing peripheral-blood lymphocytes and G-banding technology,and karyotyping analysis techniques wer...