Transabdominal ultrasound is less accurate and is clearer in patients with a thin abdominal wall and a more normal ovarian anatomical location. If the patient has a thick abdominal wall, the transabdominal ultrasound will be blurred because of interference from adjacent organs in the abdomen and gas in the abdominal cavity, making it impossible to properly assess the function of the ovaries. Patients who do not have acute vaginitis or STD, try to perform vaginal ultrasound after good vulva disinfection during menstruation. This will not only waste time by filling the bladder, but also have high clarity and can clearly monitor the size and texture of the ovaries and the number of sinus follicles to assess the ovarian function of the patient and give the patient a basis for further treatment.