A member asked:

My girlfriend and i had sex one day after her period and she took plan b one step the day after. will this prevent pregnancy?

3 doctors weighed in across 2 answers

Most likely: Plan b is quite effective. Also your girlfriend is most fertile 2 weeks before her next period is due so she shouldn't have been fertile right after her period.

Answered 11/28/2017

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Yes it will: Plan b or day after pill is recommended to prevent pregnancy.It can be taken the same day or morning after. If it is taken morning after it is about 95% effective.

Answered 6/30/2014

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