These are the three main locations for Fallopian tube blockages;
There are different types of Fallopian tube blockages based on location. Because the fallopian tubes have different parts, and as a tube, there may be different parts of the tube blocked.
Each section has its own name. Doctors have also come to find out that there are patterns of disease or trauma that may affect certain parts of the Fallopian tubes more than others.
Proximal tubal occlusion involves the isthmus. This can occur after infection such as complications from abortion, missed miscarriage, cesarean section or PID.
Midsegment tubal obstruction of the ampullary is most often due to tubal ligation damage. Tubal ligation is a surgical procedure to permanently prevent pregnancy.
Some women who have had tubal ligation change their mind later in life and choose to have this procedure reversed. This can be done surgically and has a 75% pregnancy success rate.
Tubal ligation removal comes with its own risk for development of more scar tissue on top of scar tissue already present from the initial tubal ligation procedure.
Distal tubal occlusion is the type of blockage that affects the part of the Fallopian tube end towards the ovary. This type of blockage is typically associated with hydrosalpinx.
Hydrosalpinx is often caused by Chlamydia trachomatis infection, which is a sexually transmitted disease (STD). Untreated Chlamydia is known to cause both pelvic and fallopian tube adhesions.
In less severe cases only, the fimbriae may be damaged. They may become stuck together in masses or may be damaged enough to no longer function as they should.
As we learned above, the fimbriae have the important role of sweeping the oocyte (ova) into the fallopian tube for fertilization. If they no longer function, then the oocyte never makes it to its destination for fertilization.
Damage to any part of the Fallopian tubes can also be caused by ectopic pregnancy, PID, endometriosis, uterine fibroids or abdominal surgery.