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It can be important to know how long sperm lives for after ejaculation , whether you want to become pregnant or avoid it at all costs. Sperm can live outside the body for varying amounts of time depending on where they end up and this is a rundown of how long they remain alive in the most common places they end up. This is where nature intended sperm to thrive and start their journey into the cervix the neck of the womb and then into the uterus itself. There's no better environment for them and they don't just live for hours, they survive for days. The exact length of time varies massively and depends on many factors including the sperm quality itself, the acidity of the vagina and the quality of the cervical mucus but most experts agree that two days is probably the average here although if no mucus is present it may be a matter of hours.

When a person ejaculates they release an average of 39 million sperm cells from their body. While some sperm will go on to fertilize an egg, most will die out. But, how quickly a sperm dies depends on the environment it's in.