Many women take oral contraceptives without questioning the science behind it. But as with any medication, it's a good idea to do your own research, instead of having blind faith in your doctors. So if you're on the pill, here are some surprising facts that you should know.

For example, did you know:

• That if you're overweight, the pill might not work as well for you?
• That certain drugs, such as nyquil, can interfere with the pill's effectiveness?
• That the FDA recently approved a pill that will eliminate your period while you're on it?
• That the pill may cause you to gain a couple of pounds, but not more?
• That you can safely miss one pill, but not two?

A few of these are news to me. How about you?