How long can sperm in the sperm bank survive in the human body?

The survival time of sperm depends on the location of sperm. A man with normal sexual maturity shoots tens of millions or even as many as 200 million sperm, but most of these sperm lose their vitality and die in the acidic environment of female reproductive tract.

Generally speaking, the life span of sperm in vagina is less than 8 hours, and only a few sperm escape and move on. When the sperm rushed to the uterine cavity, its number was only 1%-5% of that at the time of ejaculation. Why?

Because the sperm remaining in semen during ejaculation can be protected by a large amount of fructose and glycolytic enzymes in semen, when the sperm enters the uterine cavity, it leaves the semen, and its living conditions are far worse than those in semen, so its life span is greatly shortened, and the sperm with poor quality runs slowly and cannot reach the uterine cavity quickly, thus losing its vitality. After passing the checkpoint, there are few sperm left that can finally reach the fertilization site of the fallopian tube.

As long as sperm enters the fallopian tube, it has strong fertilization ability. Of course, only 1-2 sperm were lucky enough to combine with the egg, and the rest died within 24-36 hours. Only the sperm stored in the crypt of cervical mucosa can survive for 2-6 days, but its fertilization ability has been basically lost, because the fertilization ability of sperm can only last for about 20 hours.