Tubal imaging is performed by injecting a special contrast agent into the uterine cavity and fallopian tubes and then observing the morphology of the uterus, the extent and location of tubal blockage, and the presence of abnormalities in the uterine cavity with the aid of X-ray. In general, if there are no special circumstances, the imaging can be performed 3-7 days after menstruation; if the menstrual cycle is irregular, the imaging can be performed 10 days after the end of menstruation; if amenorrhea has already occurred, the imaging can be performed at any time. It is suitable for understanding and distinguishing primary infertility from secondary infertility, clarifying the cause of abnormal uterine bleeding and observing the situation after tubal ligation, and is a test often done for women with fertility needs. Tubal imaging is prohibited if you have vaginitis, serious heart or lung disease, or if you are in your menstrual period and there is fever. It should be noted that 3 days before the test, it is necessary to abstain from sexual intercourse to test for allergies to iodine and to check for inflammation of the genitals. A small amount of vaginal bleeding may occur, and if the amount of bleeding exceeds the amount of menstruation, prompt medical attention is required. Some patients may experience chest tightness, nausea and shortness of breath after the test, which may be a side effect of the contrast agent.