The purpose of hysterosalpingography is to diagnose the presence of uterine pathology and to understand the patency of the fallopian tubes. It is performed by injecting iodine into the uterine cavity through the cervical canal to form an obvious artificial contrast with the surrounding tissues under radiographs and to visualize the cavity of the tubes, thus understanding the condition of the uterus and the lumen of the fallopian tubes. The imaging not only indicates the patency of the fallopian tubes and the site of obstruction, but also allows observation of the morphology of the uterine cavity. This test is safe, does not require anesthesia, is painless and is acceptable to the patient. Hysterosalpingography is a common test in modern gynecological examinations. It can usually detect the cause and location of tubal disease, and many women with infertility want to find out the cause of the disease through this test. Contraindications 1. Acute and subacute inflammation of internal and external genitalia 2 Severe systemic diseases. 3 Pregnancy, menstruation, within 6 weeks after uterine surgery. 4 Iodine allergy. Preoperative preparation l. Time of imaging Select from 3 days after menstruation to the 7th day 2. No acute or subacute pelvic inflammatory disease, such as no inflammatory mass or pressure pain at both sides of the adnexa, and body temperature below 37.5℃. 3, 3 days before and 2 weeks after the imaging, avoid sexual intercourse and tub bath to prevent infection. Post-operative attention 1. 2 weeks after the imaging, refrain from bathing and sexual intercourse for 2 weeks, antibiotics can be given to prevent infection as appropriate. 2.Sometimes tubal spasm may cause the illusion of tubal incompetence, so repeat the procedure if necessary. 3. A small amount of vaginal bleeding within one week after imaging is normal if there is no other discomfort. 4. It is best to use contraception for three months after imaging to reduce the possible effects of x-ray exposure. However, it is clinically observed that there is no increased risk of fetal abnormalities in women who become pregnant in the same month after imaging.