how long can sperm survive outside
November 12, 2011. The American Pregnancy Association states that once sperm is dry it is dead. Sperm cannot be brought back to life by being re-moistened. So if the sperm has dried it is not going to get anyone pregnant. Experts have differing estimates on how long sperm can live outside the man's body. Some report it can be up to five days if the sperm stays within a warm moist environment, such as a woman's cervix. But outside of the human body, sperm have a much shorter existence, from 20 minutes to an hour, depending on such factors as exposure to air and humidity.