How can birth control help an ovarian cyst?

The main ways hormonal birth control prevents pregnancy is by stopping ovulation (when the ovary releases an egg). The pill, patch, ring, and shot are most reliable at blocking ovulation, so people using these methods may have fewer ovarian cysts. If you tend to get ovarian cysts, using these methods helps to prevent future cysts. The progestin-only, a.k.a., mini-pill, has an unpredictable effect on ovulation and may lead to more cysts. These almost always disappear on their own, but if you’ve had problems with cysts in the past, the mini-pill may not be the best option for you.