The fallopian tube includes the umbilical end, mesenchymal part, isthmus part, and jugular abdomen. Sperm and egg are combined in the jugular abdomen of the fallopian tube to form a fertilized egg, which is also known as fertilization, while sperm and egg can not be combined to form a fertilized egg, and naturally, pregnancy is not possible. Its blockage is commonly seen in the following aspects: 1, umbilical atresia of the fallopian tube: the ovary drains the egg to the abdominal cavity, and the umbilical end is responsible for picking it up; umbilical atresia can’t catch the egg, and the egg can’t enter into the fallopian tube, which can lead to infertility; 2, tubal interstitial and isthmus blockage: sperms can’t enter into the pudendal region, and can’t meet with the egg, which can lead to infertility.