The most common site of tubal pregnancy

Generally speaking, if a woman has a fallopian tube pregnancy problem, she should go to the hospital for surgical treatment in time. Because fallopian tube pregnancy is also called ectopic pregnancy, this problem can cause great damage to the female reproductive system. If not treated in time, it may be life-threatening. The causes of tubal pregnancy are also relatively complicated, and female friends also need to understand the most common sites of tubal pregnancy.

The most common site of tubal pregnancy

Tubal pregnancy is caused by the fertilization of the egg in the ampulla of the fallopian tube. The fertilized egg is blocked in the fallopian tube for some reason and implants and develops in a certain part of the fallopian tube. Generally, tubal pregnancies are most common in the ampulla, accounting for 50-70%, followed by the isthmus, accounting for 30-40%, and the infundibulum and interstitial parts are the least common, accounting for 1-2%.

The most common cause of tubal pregnancy

(1) Chronic salpingitis. Chronic salpingitis is a common cause of tubal pregnancy. Endosalpingitis causes complete blockage or stenosis of the fallopian tube; perisalpingitis causes the fallopian tube to twist and deform, affecting the normal transportation of the fertilized egg in the fallopian tube.

(2) Abnormal development or function of the fallopian tube. Too long fallopian tubes, poor development of the muscular layer, absence of mucociliary tissue, double fallopian tubes, diverticula or accessory fimbria can all be causes of tubal pregnancy. The physiological functions of the fallopian tube are complex. The peristalsis of the fallopian tube wall, ciliary activity and secretion of epithelial cells are all finely regulated by estrogen and progesterone. If the balance between the two hormones is disturbed, it will affect the transport of the fertilized egg and cause fallopian tube pregnancy.

(3) Intrauterine device. The relationship between intrauterine device (IUD) and the incidence of ectopic pregnancy has attracted attention at home and abroad. Many scholars have found that with the widespread use of IUD, the incidence of ectopic pregnancy has increased, which may be due to salpingitis after the use of IUD. But there is no consensus yet.

(4) After fallopian tube surgery. Whether tubal sterilization is performed by ligation, electrocoagulation or cuff, if a fallopian tube fistula is formed or recanalization occurs, there is a possibility of tubal pregnancy.

(5) Pelvic endometriosis. Mainly due to mechanical factors. In addition, the ectopic endometrium in the pelvic cavity may have a chemotactic effect on the fertilized egg, prompting it to implant outside the endometrium.

(6) Migration of fertilized eggs. One ovary ovulates, and after fertilization, it moves to the opposite side through the uterine cavity or abdominal cavity and enters the opposite fallopian tube. This is the migration of the fertilized egg. If the migration time is too long, the fertilized egg will grow too large to pass through the fallopian tube and will implant there.