how long do they live after ejaculation?

The lifespan of sperm after ejaculation depends on various factors, which we will review below.

How long do sperm live after ejaculation? The answer to this question depends on several factors: a sperm can last alive within the female reproductive tract for up to five days (either within the cervical mucus or the upper genital tract), sufficient time for achieve fertilization.

We are going to highlight two factors so that the sperm survival be optimal, once they are in a woman’s body:

  1. Temperaturewhich must be between 37 ºC and 37.5 ºC.
  2. Degree of acidity of the environment (pH of 7-7.5). The vagina is a hostile environment for male reproductive cells, especially outside the ovulatory period. During this time, the spermatozoa burn to death in a few minutes, since the vaginal pH is below 6. On the days of ovulation, the pH rises 1 or 1.5 points, which allows them to survive from 2 to 16 hours .

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How long do sperm live outside the body?

If they are ejaculated outside, at a temperature of 15ºC, they can live 1 or 2 days; When it is very hot, its life time may shorten. However, most of the time They die within a few minutes.

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What are sperm?

In a very basic way we can define them as the male reproductive cells that are formed in the testicle, specifically in the seminiferous tubules.

The sperm head contains DNA, which when combined with the DNA of the egg, will create an embryo. The tip of the spermatozoon corresponds to the portion called acrosome, which allows it to penetrate the ovum; the middle part contains the mitochondria, which supplies the energy the tail needs to move.

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The tail of the sperm allows them to propel themselves towards the egg. Before that it has to reach the uterus and fallopian tube to fertilize the woman’s egg.