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AskDoctor let me ask. My hand has sperm on it. I left it for about 15 minutes and then I put my hand in her vagina so she is pregnant, please wait for the doctor to answer.
TT (2002)
Answer
The life time of sperm after being ejaculated into the outside environment is very little. Just a few tens of seconds after exposure to the air is enough to "neutralize" the life of the sperm. If in about 15 minutes, there is a high chance that you can't fertilize!
