Ovarian cysts are sacs, usually filled with fluid, in an ovary or on its surface. Females have two ovaries. One ovary is located on each side of the uterus.

Each ovary is about the size and shape of an almond. Eggs develop and mature in the ovaries. Eggs are released in monthly cycles during the childbearing years.

Ovarian cysts are common. Most of the time, you have little or no discomfort, and the cysts are harmless. Most cysts go away without treatment within a few months.

But sometimes ovarian cysts can become twisted or burst open (rupture). This can cause serious symptoms. To protect your health, get regular pelvic exams and know the symptoms that can signal what might be a serious problem.