If infertility is suspected to be caused by obstruction of the fallopian tubes, it is recommended that a tubal imaging test be performed. Before the tubal imaging test, the following tests should be done: 1. ultrasound examination to understand the development of the uterus and whether there are abnormal tumors in the pelvic cavity; 2. routine laboratory tests of the white belt to understand whether there is inflammation in the vagina, if there is inflammation, the procedure should not be done, and it is recommended that the tubal imaging test should be done only after it is cured; 3. gynecological examination to understand whether there are abnormalities in the vagina, vulva and cervix, and If there is pelvic inflammatory disease, it is recommended that the procedure be performed only after cure. 4. Routine blood tests, coagulation time and electrocardiogram.