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A 29-year-old female asked:

I had unprotected sex a week after my period, can i take a plan b? last time i also had unprotected sex 2/3 days after my period, took plan b and i was 25 days late until i finally started bleeding again. my cycle is normal! will that affect my cycle

1 doctor answer1 doctor weighed in
Dr. Robert Kwok
Pediatrics 35 years experience
Find a plan A.: Plan B (or other similar emergency contraceptive pills containing hormonal medication) can alter the menstrual period bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex because Plan B works most of the time, but not all the time. Plan B should be needed perhaps once or twice in a lifetime.
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Last updated Sep 9, 2020

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