Sperm life after ejaculation
The length of time they stay alive has a lot to do with environmental factors and how fast they dry up. If you ovulate shortly after you finish your period, the sperm may still be alive and can fertilize the egg. Learn more: Can you get pregnant if you have sex on your period? Keep reading to learn more about the lifespan of sperm as well as sperm motility. Also find out which urban legends about sperm and pregnancy are true and which are false. You may have heard that oxygen kills sperm.
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Facts about sperm health and lifespan
The lifespan of sperm cells: Longevity, withdrawal, and fertility
An important aspect of fertility and pregnancy is sperm, and the lifespan of sperm after ejaculation completely depends on where it's living. How long sperm live depends on where the sperm are deposited. Sperm inside the vagina can live within cervical mucus or the upper genital tract for three to five days, allowing fertilization to occur so long as the sperm are living. This is where the six-day fertile window comes from, as sex in the five days leading up to ovulation, or on the day of ovulation, can lead to conception. Outside of the body, sperm can survive in semen for up to a few hours because they require precise conditions of warmth and humidity to survive. Sperm can be preserved for weeks when semen is stored at a lowered temperature, and for years when semen is frozen.
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How Long Can Sperm Survive After Ejaculation?
Some die within minutes, and some can live anywhere up to seven days, under perfect conditions. But most live about two or three days inside the female reproductive system, according to USC Fertility. You need just one sperm to make it to the right place — the correct fallopian tube — at the correct time — after ovulation — to create a new life. This makes it seem like pregnancy could occur very easily. It often does, of course, but most sperm die before making it to their final destination, according to the American Pregnancy Association.