There are two fallopian tubes in total, on both sides of the uterine horn, and their length is about 9-13cm, because the length of the fallopian tubes varies according to individual differences. The fallopian tubes are divided into four parts starting from the uterus, the one inside the uterine horn is called the interstitial part of the fallopian tube, then the isthmus of the fallopian tube, followed by the pot-belly of the fallopian tube, and the outer part of the pot-belly is the umbilical tip of the fallopian tube, which is the specific anatomical part of the whole fallopian tube. The vast majority of tubal obstruction in the interstitial part of the fallopian tube is clinically difficult to treat, and ectopic pregnancy often occurs in the pot-belly of the fallopian tube, with a history of menopause, early irregular vaginal bleeding or pain in the lower abdomen, we should be alert to whether it is a fallopian tube pregnancy.