A member asked:

I took plan b on june 2, three hours after intercourse and my period was due june 25. i am now late 19 days. is that normal?

2 doctors weighed in across 2 answers
Dr. Robert Killian answered

Specializes in General Practice

Pregnancy Test: Plan B is only 50% effective at preventing pregnancy. While it is well known that Plan B can change your menstrual cycle, you must first do a pregnancy test to see if you are indeed pregnant or not.

Answered 7/12/2014

3.9k views

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Dr. John Munshower answered

Specializes in Family Medicine

It may be BUT: Plan B works by hormonally interfering with fertilization of an egg. It is also possible that this type of emergency birth control prevents implantation of a fertilized egg in the uterus by altering its lining, and periods can become irregular, especially after its use. However, check a pregnancy test too. Best wishes.

Answered 7/12/2014

3.9k views

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