The fallopian tubes are not only the place where sperm and eggs are synthesized into a fertilized egg, but also have the function of transporting the fertilized egg to the uterine cavity, which is of great importance. Therefore, obstruction and stiffness of the fallopian tubes caused by pathology (inflammation, dysplasia, etc.) can easily lead to infertility in women. The tubal patency test is widely used in clinical practice because it can diagnose tubal disease, understand the site of tubal obstruction and determine whether the tubes are open after tubalplasty or anastomosis. It mainly includes tubal lavage, hysterosalpingography and hysterosalpingography. Tubal lavage: fluid is injected into the uterine cavity through a catheter, and the patency of the tubes is judged according to the pressure of the fluid injection, the presence or absence of reflux, the amount of fluid injected and the patient’s sensation, and can also unblock uterine adhesions caused by mild inflammation. The operation is simple and the cost is low, but it is impossible to observe the internal conditions of the uterus and fallopian tubes and to determine which side of the tubes is patent or obstructed, the site of obstruction and the nature of obstruction, and the rate of false patenting and false obstruction is high, so the accuracy is not high. Hysterosalpingogram: The contrast agent is injected into the uterine cavity and fallopian tubes through a catheter. Based on the contrast image in the uterine cavity and fallopian tubes, the presence of congenital abnormalities or pathological conditions in the uterine cavity and fallopian tubes can be determined, whether the fallopian tubes are patent, whether there is obstruction and the site of obstruction, and the internal structure of the uterus and fallopian tubes can be judged, so that objective diagnostic information can be obtained. HSG can provide information on the size and shape of the cervical canal, uterine cavity and uterine contour. In the absence of proximal tubal obstruction or spasm, HSG can show the length, diameter, shape and umbilical fold of the fallopian tubes. HSG can not only clarify whether the tubes are patent and the site of obstruction, but also make a diagnosis of the internal structure of the tubes. Selective tubal angiography is less invasive, and tubal angiography can make a more accurate diagnosis of tubal obstruction (especially proximal obstruction). Hysterosalpingogram: Acoustic contrast is injected into the uterus under ultrasound examination to observe its image in the uterus, fallopian tubes and the rectal fossa of the uterus. Ultrasound diagnostic methods commonly used in clinical practice to determine the patency of the fallopian tubes include transabdominal 2D ultrasound, transvaginal 2D or 3D ultrasound hysterosalpingography. In contrast, transvaginal 2D or 3D hysterosalpingography is not disturbed by pelvic gas and can clearly show the tubal alignment and structure as well as the ovaries and uterus, which has a higher accuracy. The disadvantage is that the diagnostic accuracy of unilateral tubal obstruction is low, the internal structure of the fallopian tubes cannot be observed, and the exact location of tubal obstruction cannot be clarified. The 3D hysterosalpingography with Sonovel contrast agent can reflect the structural alignment of the fallopian tubes more accurately, with a diagnostic accuracy of 89.1%, and the obtained contrast image is three-dimensional, graphic and objective. It is an emerging and safe ultrasonographic technique that avoids X-ray exposure, is easy to perform, requires no special preparation, and takes only a few minutes to obtain results.