“How long does it take for sperm to die after it leaves the body?”
Inside a woman’s body, sperm can live for up to five days depending on the conditions. If you have unprotected sex even a few days before your partner ovulates, there is a chance of achieving a pregnancy. Each month inside a female’s ovaries, a group of eggs starts to grow and eventually one of the eggs is released and this is called ovulation. It usually happens about two weeks before your next period. So you can see how a woman, who does not use contraception, can get pregnant.
If a male ejaculates on a dry surface, such as clothing or bedding, the sperm are dead by the time the semen has dried.
In water, such as a warm bath or hot tub, sperm will likely live longer because they thrive in warm, wet environments; however, the chances sperm in a tub of water will find their way inside a female bather and cause her to become pregnant are extremely low.
Hope this helps!