You are out of touch with the common usage of the word "abortion" in this country.
Please don't call president Bush a liar simply because he doesn't use your extreme definition of abortion.
No I don't think most women on birth control are even aware they're having abortions. How could they be? Certainly the pharmaceutical companies who make the abortifacients and the doctors who prescribe them haven't told them. But like it or not, realize it or not, if you're on the pill you've probably had an abortion or two.