Real time three-dimensional hysterosalpingo-contrast sonography（RT-3D—HyCoSy）is a new imagery technique.After injecting constrast agent，it can display real-time three-dimensional contrast agent in the oviduct of the courses, as well as spatial position in the uterine cavity, pelvic distributed. RT-3D—HyCoSy can demonstrate dynamic morphological features of fallopian tube，accurately assess tubalpatency and diagnose utrine malformation and lesion．It is simple with high security and does not affect the Pregnancy has great value in clinical application in the diagnosis of infertility caused by tubal diseases．