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A member asked:

Last period was aug 18 & average cycle length is 37 days; fertile sep 5-11 & ovulate sep 10, i had sex aug 31/took plan b could i fall pregnant?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Unsure: No form of birth control is 100% effective. It depends on when you took the plan b. It should be taken within 72 hours. It can prevent up to 95% of anticipated pregnancies if taken within 24 hours of sex.

Dr Pappas and another doctor agreed

Answered 9/11/2013

4.9k views

Thank

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