What are the chances of pregnancy if you just started the pill and had unprotected sex 2-3 weeks into it but before your first period while on the pill?

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September 19, 2007 3:57PM

On the label, it warns you to use another type of birth control for the first few months. You need to build up the hormone in your body before it can do what it is supposed to do. If you had sex before it got a chance to build up, then yes, you could be pregnant.