How many days the semen survives in the uterus generally means how many days the sperms in the semen can survive in the uterus, usually the sperms in the semen can survive in the uterus for 1~3 days. It is suggested that men can prolong the survival time of sperm in the uterus by adjusting their lifestyle habits. How many days the sperm in semen can survive in the uterus needs to be judged according to the sperm vitality and the state of the female reproductive system. If the sperm vitality in male semen is relatively poor, it can generally survive for 1~2 days after entering the uterus. If the sperm is more vigorous, it can survive for 2~3 days after entering the uterus. Since the survival time of sperm in the uterus is affected by sperm vitality, it is recommended that men during the preparatory period should avoid smoking and drinking, develop regular sleeping habits, and take appropriate physical exercise every day, which is conducive to enhancing sperm vitality or prolonging the survival time of sperm in the uterus in the semen, which can increase the chances of pregnancy. The survival time of the sperm in the semen in the uterus needs to be judged according to the sperm vitality, it is recommended that men during the preparatory period should avoid prolonged exposure to radiation and pay attention to a balanced diet, which can help to improve sperm vitality.