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A member asked:
How effective is plan b if taken 3 hrs before sex?
A doctor has provided 1 answer
Probably effective: Plan B is 95% effective if taken within 24 hours after intercourse. Its intended for use in an emergency so there is not a lot of research on what happens if you take it prior to intercourse. However, it works by delaying ovulation and it makes sense that it would be equally effective if take just prior to intercourse or just after. But this is my opinion and not based on research.
Answered 3/22/2015
3.1k views
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