Infections, abdominal surgery, and diseases such as endometriosis can cause scarring between the end of the fallopian tube and ovary. Infections may be, but are not necessarily, sexually transmitted. Chlamydia and gonorrhea are two common sexually transmitted infections that can cause tubal infertility. Tuberculosis, uncommon in North America, and a ruptured appendix can both cause a tubal infection. Surgery can also damage your fallopian tubes.
Pelvic Inflammatory Disease (PID) can also travel from the cervix through the uterus to the tubes, which can ultimately cause the delicate inner lining of the tubes to become permanently scarred. The opening of the tube next to the ovary may become partially or completely blocked; scar tissue will often form on the outside of the tubeand uterus.