论文部分内容阅读
Objective To investigate the empty zona pellucida for use in the cryopreservation of human sperm. Materials & Methods Human and hamster zona pellucidae were evacuated and injected with testicular, epididymal and ejaculated sperm. The zona pellucidae with sperm were cryopreserved. Results After thawing, zona pellucidae were easily found, and sperm inside zona pellucidae were also easily observed. There were no differences in post-thaw motility and vitality between ejaculated and epididymal sperm groups (P>0.05), but these two parameters were lowered in testicular sperm group compared to both ejaculated and epididymal sperm (P<0.01). No significant difference was observed in post-thaw motilities among 6%, 7.5%, 9% glycerol concentrations (P>0.05). In addition, obvious differences in post-thaw motilities were not found between human and hamster empty zona pellucidae (P>0.05). Conclusion An evacuated zona pellucida is an ideal vehicle for the cryopreservation of a small number of human sperm.