General malignant tumors, including ovarian cancer, usually have no obvious symptoms in early stage, and when ovarian cancer shows symptoms such as abdominal distension, abdominal pain, and weight loss, it usually has already reached middle and late stage. Early stage of ovarian cancer usually has no obvious symptoms, so there is no typical early signals. Individual patients with mild abdominal discomfort may be confused with digestive diseases and do not pay obvious attention to it. Early-stage ovarian cancer is mostly detected through ultrasound, CT and other examinations during physical examination or diagnosis of other diseases. Regular checkups are recommended for people with high risk of ovarian cancer, such as those with a family genetic history of ovarian cancer and those who have never had children. In middle and late stages of ovarian cancer, symptoms such as ascites, abdominal distension, abdominal pain, loss of appetite, anemia, emaciation, fatigue, low fever, vaginal bleeding, watery leukorrhea and so on will appear.