There are no typical clinical manifestations of tubal blockage, and auxiliary tests are needed to confirm the diagnosis. The following tests are commonly used to confirm the diagnosis: 1) tubal lavage, in which sodium chloride is injected into the uterine cavity under the detection of ultrasound to determine whether the tubes are patent by judging the passage of fluid through the tubes. The test is limited by certain factors, so there is a certain degree of error in the diagnosis. 2. Tubal imaging, where a contrast agent is injected into the fallopian tubes through the uterus and observed by X-ray for interruptions or thinning of the contrast agent. It can diagnose the location and degree of blockage of the fallopian tubes, which is more accurate. It should be noted that the time of pregnancy needs to be postponed because of the radiation of X-rays. 3. Laparoscopy and hysteroscopy can visualize whether the fallopian tubes are blocked or not, and can be performed at the same time.