The fallopian tubes are a pair of long, thin, curved tubes located at the upper edge of the broad ligament of the uterus, connected medially to the uterine horn and free at the outer end, close to the ovaries, with a total length of 8-15 cm. so everyone’s fallopian tubes are of different lengths, not all of them are the same, the tubes are tubular, one on each side, about 8-15 cm long. each tube has two openings, the inner opening is in the uterine cavity at the uterine horn, called the fallopian tube A uterine mouth, the outer opening in the pelvic cavity, called the fallopian tube an abdominal mouth. It connects the abdominal cavity directly to the outside of the body through the abdominal opening. The fallopian tube can be divided into four parts according to the morphology of the tube from the inner to the outer opening: 1. The interstitial part is the part of the fallopian tube located inside the myometrial wall, which we also call the proximal part, so the interstitial part is also called the inner wall. The isthmus is straight and short, occupying the inner 1/3 of the fallopian tube, about 2 to 3 cm long, extending horizontally outward from the lateral corner of the uterus to the lower end of the ovary, internally connected to the uterine part of the fallopian tube and externally connected to the jugular part of the fallopian tube. 3.Pot abdomen: the enlarged part extending outward from the isthmus is the pot abdomen of the fallopian tube. The abdominal part of the fallopian tube is the section between the opening of the ventral end of the fallopian tube and the connection of the abdominal part of the isthmus. The wall of the abdominal part of the tube is thin and curved, accounting for more than 1/2 of the total length of the fallopian tube and is about 5 to 8 cm long. 4, the funnel part is what we call the umbrella: the abdomen of the fallopian tube gradually expands outward in the shape of a funnel, called the funnel part. The opening in the center of the funnel is the opening of the abdominal cavity of the fallopian tube. The mechanism of egg retrieval mainly relies on the contraction of the smooth muscle of the tubal tract to move the umbilical end of the fallopian tube toward the ovarian ovulation site. At the same time, the smooth muscles of the fallopian tube umbilicus contract, causing the umbilicus to unfold. At this time, the intrinsic ligament of the ovary contracts and the ovary slowly rotates back and forth along its longitudinal axis, causing the open umbrella to adhere to the surface of the ovary. Then, through the negative pressure generated by the contraction of the myometrium of the fallopian tube and the powerful synchronous oscillation of the cilia at the umbilical end of the fallopian tube toward the ventral opening of the fallopian tube, the egg and its surrounding oocytes detach together from the follicle and flow with the follicular fluid to the opening of the fallopian tube. The freshly discharged egg has a strong adhesive surface and can adhere to the cilia at the umbilical end and move towards the fallopian tube with the oscillation of the cilia, entering the fallopian tube. To sum up, the umbilical end of the fallopian tube is used to catch the egg. Let’s talk about tubal patency: first we need to classify the fallopian tubes as either open or blocked. Obstruction is classified as proximal obstruction, isthmus obstruction, abdominal obstruction, and corymbal adhesions which are basically inaccessible to the pelvic cavity, depending on the location of the obstruction. In general, proximal obstruction has a high success rate through ssg (guidewire intervention), narrow obstruction has a high success rate through ssg without a history of ectopic pregnancy, isthmus obstruction with a history of ectopic pregnancy (obstructed side) and abdominal obstruction and cuspidural adhesions are generally not recommended for ssg. If the fallopian tubes are patent, we classify them according to their degree of patency: patent, basic patent, patent but not patent, patent but not patent, patent but extremely In general, as long as the fallopian tubes are open, there is a possibility of pregnancy, but the possibility of ectopic pregnancy is higher in order. Of course, pregnancy is an extremely complicated process, we cannot say that you can get pregnant within a month if your fallopian tubes are open, only that the success rate of pregnancy is high, according to our previous follow-up visits, i.e. telephone follow-ups within six months and one to two years after ssg, we found that the success rate of pregnancy after ssg is very high if only the fallopian tubes are considered to cause infertility.