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A 38-year-old female asked:

Is plan b still effective if sex took place 2 days post ovulation? how long after can i still take it? how long after ovulation is pregnancy possible?

1 doctor answer1 doctor weighed in
Dr. Yash Khanna
Family Medicine 57 years experience
24 Hours: According to american pregnancy association an unfertilized egg only remains viable for only 24 hours after ovulation.So sex couple of days after ovulation is less likely to result in pregnancy and if you take Plan B it has a better chance of preventing pregnancy.

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Last updated Jun 30, 2014

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