A member asked:

I had protected sex with my boyfriend. he used a condom and made sure when he finished it did not tear or break, just to make sure i took plan b 24hr later. after a week from taking plan b i got my period a week earlier than expected. it was normal, 5 day

A doctor has provided 1 answer
Dr. Karen Pendleton answered

Specializes in Preventive Medicine

This is a normal.: Plan B pills contain a high dose of the active ingredient Levonorgestrel, which is a second generation progestin. Progestins, just like natural Progesterone cause the uterine endometrium to slough thus causing a period. That is why your period was early.

Answered 8/9/2015

2.4k views

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