The epidemiology of ovarian cysts is unclear due to the lack of consistent reporting and a high likelihood of spontaneous resolution. In the USA, postmenopausal women have an ovarian cyst incidence of 18% over a 15-year period. Worldwide, about 7% of women have an ovarian cyst at some point in their lives. In Europe, a large screening trial revealed a 21.2% incidence of ovarian cysts among heal...