If the sperm is ejaculated outside the body, it usually survives for about half an hour; if it is ejaculated inside the woman’s body, it usually survives for about two to three days, but it is not possible to make a generalization, usually more than the time of sperm’s survival, it will be inactivated and cannot be fertilized. Normal sperm has a certain degree of activity, and the combination with the egg in order to form a fertilized egg, sperm drying will be inactive, and can not be fertilized. The survival time of sperm is related to the existence of space, if shot outside the body, generally survive for about half an hour; if shot in the female body, generally survive for two to three days. In addition to sperm activity affecting pregnancy, the physical health of both partners, whether the sperm and eggs are normal, and whether or not to have intercourse at the time of ovulation will also affect the chances of pregnancy. Patients with abnormal sperm activity should go to a regular hospital in time to find out the cause of the disease under the guidance of the doctor and take active treatment.