Hysterosalpingography is the most classic method to determine the patency of the uterine cavity and fallopian tubes. Due to the limitations of hysterosalpingography (including iodine oil or iodine water contrast), i.e., false negative or false positive diagnostic results, there are obvious deficiencies in the diagnosis of tubal obstruction in particular, and the cause of tubal obstruction is often not identified. In particular, the diagnosis of tubal obstruction has obvious deficiencies, especially in identifying the cause of tubal obstruction, such as tubal spasm or mechanical obstruction, whether it is a membranous adhesion, mucus plug obstruction or fibrous adhesion obstruction, especially in the diagnosis of interstitial tubal obstruction, whereas selective tubal angiography helps to identify the cause of obstruction, and if it is a mucus plug or a membranous adhesion, it is very easy to remove and separate the tubal obstruction and make it pass again, which can eliminate unnecessary laparoscopy, caesarean section and other invasive surgeries. Hysterosalpingography is used to determine the patency of the fallopian tubes based on the amount of contrast remaining in the fallopian tubes on plain film. In contrast, selective tubal angiography is performed separately for the left and right fallopian tubes, and then the degree of patency of the fallopian tubes is judged according to the contrast coating or diffusion in the pelvis and the amount of contrast residue in the fallopian tubes, so the diagnosis of unilateral patency of the fallopian tubes and adhesions around the umbilical ends of the fallopian tubes is more accurate. The therapeutic effect of selective tubal imaging is produced by the squeezing and separation of the fallopian tubes by the fluid pressure of the contrast agent and the lavage drug solution (which has anti-inflammatory and anti-adhesion effects), thus avoiding the illusion of tubal obstruction caused by the spasm of the fallopian tube sphincter and the painful dilatation of the uterine cavity due to the contrast agent (iodized oil and iodized water solution), and then performing guidewire intervention, i.e. tubal recanalization, on the fallopian tubes that cannot be completely recanalized. Therefore, on the basis of HSG, it is very necessary to choose SSG reasonably in order to further improve the probability of pregnancy.