What is fallopian tube blockage? Fallopian tube blockage means that there is an obstruction inside or outside the fallopian tube, which prevents the egg from passing through the fallopian tube and reaching the uterus smoothly. Fallopian tube blockage is one of the main causes of female infertility. Since the egg cannot meet the sperm, the chance of fertilization is greatly reduced, leading to infertility. What are the symptoms of oviduct blockage? 1. Abnormal menstruation. Fallopian tube blockage will cause menstruation to become irregular or reduced, especially the duration of menstruation is shortened. 2. Abdominal pain because the fallopian tube lumen is blocked and the egg cannot pass smoothly