Hysterosalpingography is an X-ray examination method. While injecting contrast agent (mainly 40% iodized oil) into the uterine cavity through the cervix, X-ray fluoroscopy is performed to observe the situation, shape, size and abnormality in the uterine cavity. Whether the contrast agent can enter the fallopian tube cavity; The situation in the fallopian tube cavity, whether the contrast agent can enter the pelvic cavity. After 24 hours of contrast, X-ray was taken to determine whether there was contrast agent in the pelvic cavity.