The main reason for the development of pathology is a violation of the patency of the pipes or pathological processes in them. The latter includes the following states.
• Chronic adnexitis. Even inflammatory processes that have been successfully treated often leave behind fibrous structures and adhesions that prevent the passage of the fetal egg into the uterine cavity.
• Violation of the innervation of the pipes. Deficiency of nerve endings in the tubes follows inflammation and leads to the death of the mucous villi. As a result, the transport function of the organ is disrupted, due to which the fertilized egg cannot enter the uterine cavity.
• Anomalies of development. They occur even during the formation of the genital organs in girls in utero. Most often, there are additional fallopian tubes, as well as additional holes in the area of their gaps.
• Hormonal imbalance. It leads to the loss of normal peristalsis of the smooth muscles of the tubes.
• Postponed operations. Surgical interventions contribute to the formation of adhesions in the tubes, which makes it difficult for the fetal egg to move.
• One pipe. If ovulation occurs from the side of the removed tube, then the egg will take much longer to reach the target through the second one, so it can be implanted elsewhere.