1. The patient takes the cystotomy position, bends both knees and lies supine on the fluoroscopic examination table, and cooperates with the doctor to take one X-ray film of the pelvis before contrast; 2. Cooperates with the doctor to disinfect the vulva and vagina, and dilates the vagina with the vaginal speculum to expose the cervix adequately; 3. Selects the contrast agent, which can be iodine-containing aqueous agent (e.g., panthene glucosamine, iodofortol, etc.) or iodine-containing oily agent (e.g., ultra-liquefied iodine oil, iodized oil, etc.); 4. Introduce the catheter into the uterine cavity through the vagina under aseptic conditions and slowly inject the contrast agent under the guidance of X-ray fluoroscopy; 5. If the contrast agent is in aqueous form, the pelvic review film will be taken 20 minutes after contrast; if the contrast agent is in oil form, the pelvic review film will be taken 24 hours later.