Ovarian cysts are very common in people who menstruate, with an estimated 10% to 30% of women — and potentially more — developing at least one in their lifetime. These fluid-filled sacs develop in or ...

Ovarian cysts are fluid-filled sacs that form on or inside the ovaries for a variety of reasons. Often, they disappear on their own, but sometimes, they can grow very large, burst or cause an ovary to ...