The procedure takes about 10 minutes: the doctor puts the contrast tube into the uterine cavity through the vagina and then injects the contrast into the fallopian tubes. This takes about 10 minutes. However, to see if the fallopian tubes are open, it is also necessary to see if the contrast is flowing from the fallopian tubes into the pelvis. Therefore, another film will be taken after the procedure to see the free contrast inside the pelvic cavity to confirm whether the fallopian tubes are open or not. If the contrast agent is aqueous, a film will be taken after 20 minutes; if it is oily, it will take 24 hours to take a film after diffusion.