It depends, if you have EWCM then the sperm can last the 3-5 days, if not, you'll be lucky to last 24 hours from what I've read. If you O'd on the 1st or 2nd, there's be a good chance, but not if you 0'd on the 5th.
The amount of time sperm last really depends on the environment, and the sperm itself. If you want to get pregnant it's best to BD with in 24 hours of O.
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