How long does sperm survive in the body?

A man's sperm and a woman's egg must combine to make a woman pregnant. A normal man can release hundreds of millions of sperm in one ejaculation, but most of these sperm lose their vitality and die due to the acidic and alkaline environment of the female reproductive system. How long can sperm survive in the female body?

Generally speaking, the life span of sperm in a woman's vagina is no more than 8 hours. Then only a small number of sperm will escape and continue to move forward. Why is this? Because during ejaculation, sperm in the semen can obtain a lot of glucose and sugar-dissolving enzymes in the semen to protect it, and when sperm enters the uterus, it leaves the semen. At this time, the living environment is far worse than in the semen, so the life span is greatly shortened. Poor-quality sperm moves slowly and cannot reach the uterine cavity quickly, and loses its potency.

So, after the sperm enters the woman's body, how long can the sperm survive in the woman's body? Experts suggest: After the sperm undergoes a translocation, only a few sperm can finally reach the bilateral fallopian tube fertilization site. However, as long as the sperm enters the bilateral fallopian tubes, it has a strong fertilization ability. Of course, in the end only 1-2 sperm are lucky enough to fuse with the egg cells, and the other sperm die one after another within 24-36 hours. Only the sperm stored in the crypts of the cervical mucosa have a lifespan of 2-6 days, and even so, its fertilization ability has been basically lost, because the fertilization ability of most sperm can only last about 20 hours.

The fertilization ability of the egg cell is strongest within 15 to 18 hours after being released from the uterus and ovary, and can maintain the fertilization ability for about 30 hours. After that, the egg cell begins to change sex, and the fertilization ability quickly weakens and disappears.

Although the sperm injected into the female reproductive system can survive for up to 4-5 days, the time with strong fertilization ability is only 1-2 days. In other words, pregnancy is possible only if you have sex within 1-2 days before or after the female ovulation period. This is very important for the specific guidance of infertile couples in their sexual life. Some couples have no problem with fertility, but because they ignore the opportunity to conceive, they suffer from infertility for many years after marriage.