If you take birth control pills, or you’re trying to find the best method of contraception for you, you may have asked yourself, “Do you ovulate on birth control pills?” The short answer is “No.” Birth control pills are designed to prevent ovulation, and, on the off chance that you do ovulate while on the pill, it works with two other back up methods to prevent pregnancy. That’s why the pill is so good at preventing pregnancy — in fact, it’s more than 99 percent effective when used perfectly.