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A member asked:
Forgot to take last pill of month on fri, took plan b mon morning. should have started period tues, haven't. normal for it to be late b/c of timing?
A doctor has provided 1 answer
Pill: It is normal for it to be late or missed totally. Plan b is a progestin meaning it acts like Progesterone in your body. In the menstrual cycle, Progesterone decreases right before menses occurs. Also usually after your last pill, then the progestin drops. Because you just took a high dose progestin it may think it shouldn't have a period yet. Hence the late, possibly missed period, .
Answered 6/30/2014
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