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Menstrual cycle



My question is: Can the One step Plan B, completely mess up my cycle? My period was 12/4/09... had unprotected sex 12/26/09 took plan B 12/28/09 I figured my period was due around end of December into Jan `10.. I am 42 years old. But prior to December, my period, was always off, in October I had it twice..


Emergency contraception can disrupt your menstrual cycle. However, if your period is late you should do a home pregnancy test. If it is negative, you should repeat the test in two weeks, if your period has not started by that time.

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Go to the Gynecology health topic, where you can:

Response by:

Lisa M Keder, MD, MPH Lisa M Keder, MD, MPH
Clinical Associate Professor of Obstetrics & Gynecology
College of Medicine
The Ohio State University