A member asked:

If i take birth control at 9pm everyday then on day 22, i wont spot/breakthrough cause drug is still in system from day 21 until 9 pm that day?

A doctor has provided 1 answer

Sort of like that: One can think of it that way. It's a bit more complex than that, but the complexities aren't important. Life is not so exact, so one can't predict the exact clock hour at which withdrawal bleeding will start.

Answered 6/24/2015

2.7k views

Thank

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