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How long can human sperm survive?

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How long do human sperm survive depends on where the sperm is and conditions such as temperature, moisture and energy levels.

Most people say sperm survive up to seven days , but sperm can live naturally inside the body for an impressive amount of time.

Sperm cells burn a lot of energy, but they need to get it from the female reproductive tract.

The sperm's ability to wait it out in the oviductal reservoirs essentially ensures that hundreds of sperm are prepped and ready to go when an egg arrives.

"There's more chance of getting pregnant closer to ovulation, and the day of ovulation," Barratt said. "Surviving for a longer period of time gives that flexibility".