The survival time of spermatozoa depends on the environment in which they live and is highly dependent on the environment, and they can survive for hours to decades.
If it is in the cervical position of a woman, the average survival time is 48 hours, and in the woman’s uterus the average survival time is 24 hours. If the sperm enters the woman’s fallopian tubes, the average survival time is 48 hours.
Generally speaking sperm prefer a warm, moist environment. After a man ejaculates, if said sperm lands on the surface of a drier object such as a bed sheet, the sperm will not survive once the semen dries out.
Most sperm in the female vagina, the average survival time of 0.5-2 hours, this is due to the female vagina is an acidic environment, the sperm survival impact is relatively large.
In unique sperm banks, cryopreserved sperm can survive for over a decade or even decades.