Typically performed by a radiologist in a hospital setting and without anesthesia. A device is placed on the cervix and dye is injected into the uterus under pressure. This causes the dye to fill the cavity of the uterus and then, ideally, flow into and through the fallopian tubes, spilling out the end of the tubes into the pelvis. The dye can be seen on x-ray, which is used to monitor the procedure.