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 a woman's menstrual cycle. Most cysts are benign and may resolve on their own without treatment. In some cases, ovarian cysts can cause symptoms such as pelvic pain, bloating, or changes in menstrual cycles. While many cysts are harmless, it's important to monitor them, as some can lead to complications or indicate underlying health issues. Regular check-ups with a healthcare provider can help manage any concerns related to ovarian cysts.