How long can sperm survive outside the body?

Ejaculation may cause male sperm to remain outside the body. Male infertility is related to male sperm, such as oligospermia, azoospermia, weak sperm, ejaculation bleeding, etc., which are all causes of male infertility. Male sperm has a very short survival time in the body. It can only survive for 8 hours in a woman's vagina. How long can male sperm survive outside the body?

How long does a man's sperm survive outside the body?

Sperm is produced in the testicles, and it takes about 10 weeks for sperm to mature. The mature sperm is stored in the epididymal cyst. Sperm is the smallest cell in the body, and it requires a balanced amount of energy to replenish. A normal adult male can produce 70 million to 150 million sperm per day. There are about 3 million sperm at the tip of an erect penis.

The survival time of male sperm outside the body actually varies from person to person and is also related to the external natural environment. Male sperm can survive for about 24 hours in the semen of a man's ejaculation. If the temperature is reduced, the semen can also be stored for several weeks. The following is the survival time of male sperm in different natural environments:

(1) The survival time of active sperm in a natural environment at 37°C: 4 to 8 hours or more;

(2) Sperm survival time in the vagina: 0.5 days;

(3) Sperm survival time in the cervix: 2 to 8 days;

(4) Survival time of active sperm in the uterus and bilateral fallopian tubes: 2 to 2.5 days.

(5) If the temperature is lowered, the sperm survival time can reach several weeks; if liquid nitrogen is used for refrigeration, the sperm survival time can be longer, and can even be stored for a long time.

How long can male sperm survive in a woman's body?

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

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

Although sperm ejaculated into the female reproductive system can survive for up to 4 to 5 days, its strong fertilization ability lasts only 1 to 2 days. In other words, pregnancy is only possible if you have sex within 1 to 2 days before and after the female ovulation period.