Hysterosalpingography (HSG) is the most classic method to determine the patency of the uterine cavity and fallopian tubes. Due to the limitations of hysterosalpingography (including contrast with iodine oil or iodine water), i.e., false negative or false positive diagnostic results, especially in the diagnosis of tubal obstruction, it is often not possible to identify the cause of tubal obstruction. In particular, the diagnosis of tubal obstruction has obvious deficiencies and often fails to identify the cause of tubal obstruction. In particular, the diagnosis of tubal obstruction has obvious deficiencies, especially in the diagnosis of tubal obstruction, such as tubal spasm or mechanical obstruction, whether it is a membranous adhesion, mucus plug obstruction or fibrous adhesion obstruction, etc. The diagnosis of interstitial tubal obstruction is especially inadequate, whereas selective tubal angiography can help identify the cause of obstruction, and if it is a mucus plug or membranous adhesion, it is very easy to remove and separate the tubal obstruction, and the tubal reopening can be avoided by unnecessary laparoscopy, caesarean section and other invasive surgeries.