A member asked:

Can you have a light period and still be pregnant? would have conceived in oct. took plan b and have had a period each month since. not feeling right.

A doctor has provided 1 answer
Dr. Matt Wachsman answered

Specializes in Internal Medicine

Odd things happen: It is possible, but not that common. Plan b however has about a 10% failure rate. The rate is higher if the person taking it is large. Iif you dissolve a chemical into a larger container, the concentration of it goes down and, plan b works by being just a little bit of an overdose. oh, it also changes menstrual cycle for one and often 3 periods. including spotting.

Answered 4/1/2019

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