2 doctors weighed in:

How long does it take for oral birth control to be effective?

2 doctors weighed in
Dr. David Kurss
Obstetrics & Gynecology
1 doctor agrees

In brief: Immediately if...

I usually recommend to pts to start their pill on day one of their cycle.
If done this way, and it is truly your normal menses, the pill should protect you from pregnancy right away.

In brief: Immediately if...

I usually recommend to pts to start their pill on day one of their cycle.
If done this way, and it is truly your normal menses, the pill should protect you from pregnancy right away.
Dr. David Kurss
Dr. David Kurss
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