If : If taken within the first three days after intercourse, Plan B is 75% to 85% effective in preventing pregnancy. If taken within 12 hours of having sex, the efficacy is even higher than that. Add that you were using a condom and did not ejaculate into her, the odds of pregnancy are very, very slim. That being said, nothing is impossible, so if she misses her period this month, she may want to take a pregnancy test just in case.
Answered 10/20/2018
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Not likely: Plan B One-Step can reduce your risk of pregnancy by up to 95% if used within 24 hours of sex. If taken within 72 hours it can reduce risk of pregnancy by up to 89%.
Answered 10/20/2018
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