Compared with hysteroscopic tubal passage: 1. the procedure can be completed under DSA fluoroscopy, and the distance and situation of the guidewire entering the fallopian tube can be observed throughout the procedure to avoid perforation caused by blindness; 2. fluoroscopic imaging can understand the morphology of the fallopian tube, the presence of tubal nodular inflammation, and the presence of fluid at the umbilical end; 3. dynamic understanding of the opening of the umbilical end of the fallopian tube and the diffusion of the contrast agent in the pelvis; 4. the success rate of guidewire recanalization of the fallopian tube under SSG is high; 5. The success rate of SSG is high; 5. SSG can further clarify the causes of poor tubal visualization during HSG (tubal spasm, high tension or obstruction); 6. Mild membranous adhesions at the umbilical end of the fallopian tube can be witnessed to open under fluoroscopy; 7. Hysteroscopic lavage: 1. can only see the inner opening of the fallopian tube and judge the degree of tubal patency according to the resistance of the pushed medicine and the presence or absence of reflux, which is subjective; 2. can’t understand the opening of the umbilical end of the fallopian tube dynamically; 3. can’t observe whether there are adhesions in the pelvis; 4. can’t observe whether there is nodular tubal inflammation; 5. if the tubal fluid is obvious and the pushed medicine enters the bag of fluid without reflux, it will cause the illusion of tubal patency; 6. 6. There is blindness in guidewire recanalization and tubal perforation is difficult to detect, resulting in the drug entering the pelvic cavity directly through the perforation and mistakenly thinking that the fallopian tubes are open.