The survival time of sperm outside the body is related to the temperature of the environment. In a dry environment, sperm can only survive for a few minutes to a few hours, in the vagina, sperm can survive for a few hours to a few days, and cryopreserved sperm can even survive for many years. After the sperm leaves the male, if it is in a dry and exposed environment, it will survive for a shorter period of time, usually only for about 30 minutes, and in some men, the sperm can only survive for 5 minutes. However, if they are in the female vagina, they can survive for hours to days. Sperm can survive for longer if they are placed in an ultra-low-temperature freezer. After the sperm is discharged, if men find that the semen is not liquefied or has blood in it, they should have a timely examination and cooperate with the doctor for active treatment, so as not to affect the reproductive function. Men with poor sperm quality should moderate the frequency of coitus and exercise more to enhance their physical fitness.