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A member asked:
I am on birth control pills and took plan b a day before my period was suppose to come. i haven't gotten my period yet, did plan b throw it off?
A doctor has provided 1 answer
Maybe: Taking Plan B or other emergency contraception pills can alter the timing or the quality of the current menstrual cycle and the upcoming cycle. One should check a urine pregnancy test 3 weeks after taking Plan B, because emergency contraceptive pills work most of the time but not all of the time.
Answered 12/23/2017
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