There are various methods of tubal patency examination, each with its own advantages and disadvantages. At present, the three most used methods in clinical practice are hysterosalpingography under X-ray by radiologists, tubal lavage by gynecologists and ultrasound tubalpingography by ultrasound doctors. I. Examination of hysterosalpingography: HSG is the first-line screening method for preliminary evaluation of tubal function in female infertility examination, which can diagnose whether the fallopian tubes are open and the degree of openness, understand the site of tubal obstruction, collaborate to diagnose congenital malformation of the uterus, uterine adhesions and occupying lesions in the uterine cavity, suggest pathological conditions such as pelvic adhesions, and have a certain degree of therapeutic effect. Some foreign studies have also recommended HSG as a routine outpatient test prior to assisted reproduction for pregnancy. Diagnostic hysterosalpingography requires high-quality dynamic observation throughout the examination and timely radiographs. The standardized hysterosalpingography film and examination are the basic guarantee of high quality imaging film, which is the basis of correct diagnosis. HyCoSy: HyCoSy, as an emerging technology in recent years, is less accurate than HSG in evaluating tubal patency, but its main advantage is that it can simultaneously evaluate the pelvic organs under ultrasound guidance, especially in the observation of myometrial tissue, adnexa and follicular maturity, which has unmatched advantages of hysterosalpingography (HSG). It is becoming the first-line examination for infertility because it has no X-ray damage to human body. Tubal lavage or hydrosalping: using Mebane or saline to inject into the uterine cavity from the cervix. Then it flows into the fallopian tube from the uterine cavity. According to the size of resistance when pushing the fluid and the situation of fluid reflux, we can judge whether the fallopian tube is patent or not. It used to be the main method of tubal patency examination, but now it is mainly used in primary hospitals. Selective tubal imaging under X-ray: Selective tubal imaging under X-ray is a method of imaging by inserting a micro-catheter from the endotracheal opening of the uterine cavity, with a high diagnostic accuracy of nearly 100%. The greater pressure generated by the pressurized injection of the drug has a stronger effect on the separation of tubal adhesions, and the chance and degree of restoration of patency are much higher than those of other examination methods. Tubal drug infusion therapy and interventional therapy are also feasible. 5. Hysteroscopic tubal intubation and lavage: After dilation, a hysteroscope is inserted through the cervix and a 5F catheter is inserted through the hysteroscope from the opening of the fallopian tube for selective tubal imaging. Interventional treatment can also be performed with a guide wire delivered from the catheter in case of incompetence. Laparoscopic tubal lavage: injecting diluted solution of Melan into the tubal catheter through the cervix and uterus, and observing the flow of Melan from the umbilical end and the filling of the fallopian tube under the lumpectomy to determine the usual nature of the fallopian tube. Meanwhile, lumpectomy can diagnose the pelvic cavity in detail and treat pelvic lesions and distal tubal lesions. Hysteroscopy and laparoscopy: It is the gold standard for tubal examination. The hysteroscope is inserted through the cervix and selective tubal melanoplasty is performed. At the same time, it can diagnose and treat diseases such as endometrial polyps in the uterine cavity, pelvic lesions and tubal lesions. Tuboscopy: Tuboscopy can be performed under the guidance of hysteroscope or laparoscope (or alone) to enter the fallopian tube cavity for examination and treatment. Through tuboscopy, some of the emboli or fragments in the fallopian tubes can be moved and discharged, and small intra-tubal adhesions can be loosened to achieve the effect of unblocking the fallopian tubes. Minor tubal luminal adhesions can be separated by a small guidewire. More severe adhesions or mild tubal stenosis can also be treated by balloon dilation. Radionuclide hysterosalpingography: Radionuclide hysterosalpingography is a result of the development of nuclear medicine. It uses the superior physicochemical properties of the tracer to be injected into the uterine cavity to simulate the movement of sperm in the internal reproductive tract, thus showing the patency of the fallopian tubes and their function under physiological conditions. The use of nuclide-labeled human granular polyvalent protein (MAA) is injected into the cervical canal, and the contraction and peristaltic function of the fallopian tubes are determined through the visualization of the fallopian tubes and ovaries after 30 minutes. Scientific research, clinical application is rare.