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sperm-how long does the sperm stay alive ?

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how long does the sperm stay alive when its outside..if i put my sperm inside a tube after it eject from my penis and stick it into a woman vagina and push the sperm out of the tube and into the vagina can she get pregnant.
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First Helper unknown85

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replied January 30th, 2011
Sperm has to be in a warm moist environment in order to survive. If those conditions are met, sperm can live for up to 72 hours. It can exist for no more than an hour, I believe outside of the warm, moist environment unless it is frozen as they do in sperm banks.
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