Conclusion: Cryopreservation does not affect DNA integrity of undamaged sperm of infertile men, however, it can increase the degree of DNA damage of sperm that had been damaged before freezing.

• 结论精液冷冻对不育患者完整的精子核DNA链无影响，但可能加重冷冻前已有损伤精子核DNA链的损伤程度。