Patient's question:
How long does sperm lose its fertilization ability outside the body?Doctor's answer:
Under normal circumstances, within 1 hour of semen being expelled from the body, more than 70% of viable sperm should remain. If dead sperm exceed 40%, it can affect fertility. The survival rate of sperm should maintain over 20% after 6 hours. If no viable sperm remain within 6 hours, it can lead to infertility.