Early screening for ovarian cancer allows for about 20% of cases to be diagnosed in their early stages. Detection generally follows these procedures: 1. Routine gynecological health check-ups. 2. Visiting a hospital due to certain symptoms. 3. Ovarian cancer screening. Common methods include transvaginal ultrasound and serum CA125 testing. Additional tests include tumor marker CA125 and checks for AFP, CA19-9, and CEA. Ultrasonography (B-ultrasound) can preliminarily determine the tumor size, shape, solidity, location, and its relation to surrounding organs. CT scans and MRI can further clarify the tumor's nature and the extent of invasion into the abdominal and pelvic organs. If necessary, gastroscopy can be performed to rule out primary gastrointestinal tumors, and if economic conditions allow, a PADCT scan can also be conducted.