Normal ovaries are very small in size and located deep in the abdomen, so when there is an abnormality such as ovarian cancer, it is often difficult to diagnose in the early stages because of vague symptoms, it is difficult to feel any changes. any development. So anyone with unexplained abdominal symptoms lasting more than 2 weeks should see a doctor. According to studies, only about 19% of ovarian cancer patients are diagnosed at an early stage, mainly through incidental physical examination or screening.