The survival time of spermatozoa is related to the temperature, humidity, acidity and alkalinity of the external environment. 1. After in vitro ejaculation, the spermatozoa are exposed to the external environment, affected by temperature and humidity, and the spermatozoa become jelly-like under the action of spermatozoa coagulation enzyme, and the survival time is generally very short, about 10 to 30 minutes, and if the environment is more suitable, they may survive for several hours. 2. After ejaculation in the body, the sperm stays in the vagina and uterus, where the temperature and humidity are more suitable, and the survival time is relatively long, usually up to a few hours to a few days. 3. After the sperm is discharged, it can be preserved for a very long period of time, up to several decades, through special low-temperature freezing technology. Therefore, if you have the requirement of having children, it is recommended to have intercourse before ovulation, which can effectively increase the chance of conception. Please consult your doctor for any related diseases.