I don't use birth control, but I'm very regular, so I use the rhythm method. You know counting the days when I start to ovulate and then abstain from having sex during that time period. I don't want to take birth control pills because of the side effects, including pulmonary embolisms. It's bad enough I have to take psychiatric meds. hehe. But if I weren't regular, I would use some form of birth control no matter what, even if it's just a condom.