Under normal circumstances, most of the spermatozoa survive in the vagina for 1 to 2 days, after which the spermatozoa in the female vagina will basically die due to its weak acidity and certain self-cleaning function. Normal spermatozoa are alkaline, and after entering the female body for 1 to 2 days without encountering a suitable egg for fertilization, they will die because of the acidic environment, and then they will be discharged with the normal secretions of the female body. After the sperm completes its energization, it enters the uterine cavity and can survive for another 3 to 4 days in the woman’s upper reproductive tract system. Therefore, although there are a lot of sperm, very few of them actually survive to enter the uterine cavity. In the week before and after vaginal ejaculation in coitus, if a woman ovulates, she may conceive. Knowing the survival time of sperm in the vagina can help in the preparation for pregnancy, and you can consult a medical professional for advice.