It has happened. It's more effective than any other type of BC, but if you DO get pregnant, they have to leave the IUD in and it can cause problems. Removing the IUD usually causes a miscarriage, so it depends. I've heard of A LOT of cases where you can still get pregnant with it in, and unlike anyother BC, you can't just stop taking it.
at 2:24 PM on Feb. 11, 2009