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If you have a period after day 21 of taking the combined oral contraceptive can you be 100 percent certain that you are not pregnant?

Answer:

Answer

No birth control pills prevent pregnancy 100 percent. Only birth control pills AND a condom will prevent pregnancy 100 percent.

You can become pregnant when you've recently started taking the pill. If you started taking the pill less than 2 months ago, there is a slim chance you can still get pregnant. Because of this you should use a backup method of protection such as a condom.

First answer by TrishaR. Last edit by TrishaR. Contributor trust: 2422 [recommend contributor recommended]. Question popularity: 79 [recommend question].

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