The function of the fallopian tubes is to perform gamete transport, maturation, fertilization, and early embryonic development. The fallopian tube fluid contains 17 amino acids. The continuous secretion of small amounts of fluid in the fallopian tubes is necessary to maintain the patency of the tubes. 30-50% of female infertility, and is the first cause of infertility. Causes of tubal lesions: Infection: most common Endometriosis Postoperative adhesions Pelvic tumors Nodular tubal isthmus Tubal congenital anomalies Tubal lavage: simple, effective and economical, with some errors in the diagnosis of hydrosalpinx and tubal opacification, with a correct diagnosis rate of less than 50%, suitable for primary care hospitals Effects of repeated tubal lavage Each lavage increases the chance of infection, especially if sterilization is not strict. This method is a blind lavage and cannot visualize the patency of the fallopian tubes. The laparoscopy combined with hysteroscopic tubal lavage is now widely recognized as the “gold standard” method for detecting tubal morphology, patency and pelvic adhesions. “Interventional treatment of tubal obstruction is mainly suitable for obstruction at the proximal end of the fallopian tube. The structure and thickness of each segment of the fallopian tube varies greatly, while the interstitial and proximal segments of the isthmus are short and straight, and the muscle wall is thicker, so it is easy to operate and has a high success rate. The distal part of the isthmus is tortuous, soft and dynamic, and the guidewire is not easy to pass, and the muscle layer is weak, so the rate of tubal perforation can be 3-11%. Interventional treatment for tubal obstruction: because it cannot be performed under direct vision, it is impossible to understand the pelvic cavity. Although the fallopian tubes are patulous, the function of the tubes cannot be restored because of tubal adhesions or fluid accumulation at the umbilical end, and the pregnancy rate cannot be improved. In patients with tubal effusion who have severe damage to the umbilical end of the fallopian tube, postoperative recovery of tubal function is difficult, and the rate of postoperative re-adhesion increases and the pregnancy rate decreases. For older patients with poor ovarian function and severe pelvic adhesions, IVF should be chosen directly to assist pregnancy. For repeatedly unblocked fallopian tubes, whether after natural cyclic intercourse or guided intercourse after regular ovulation treatment, or after regular ovulation treatment with IUI, if no pregnancy has occurred after 3-6 consecutive cycles of treatment, loss of tubal function or other factors such as egg quality, ovulation and IUI should be considered. IVF technology offers an excellent treatment option for couples with tubal infertility.