Ovarian cysts are fluid-filled sacs that develop on or within the ovaries, which are part of the female reproductive system. They are common and often occur during the menstrual cycle. Most ovarian cysts are benign, meaning they are not cancerous, and many women may not even realize they have them. While many ovarian cysts resolve on their own without treatment, some can cause symptoms such as pelvic pain, bloating, or changes in menstrual cycles. In rare cases, larger cysts may require medical intervention. Regular check-ups with a healthcare provider can help monitor any cysts that develop.