Under normal circumstances, if the sperm of an adult male reaches a viability rate of 60% or more, then it has the ability to fertilize a woman. Under normal circumstances, after the male sperm is ejaculated, if it does not enter the female vagina, then it will survive for 30-60 minutes at most. If there is no safety measure between the couple and the male semen is directly ejaculated into the female vagina, in this case the sperm can survive in the female’s body for 72 hours. This means that the sperm can survive in the woman’s body for up to 72 hours, i.e., at least three days before the sperm becomes fertile. If the sperm combines with the egg during this time, it will form a fertilized egg, but if it does not combine with the woman’s egg, it will not result in a pregnancy at all. But it doesn’t mean that the sperm has less time to survive in the woman’s body, and it doesn’t really affect the sperm’s ability to conceive, it just doesn’t make the woman pregnant because the sperm didn’t combine with the egg cell. From this point of view, the sperm is really fertile for at least three days or so.