•  Infections like chlamydia damage the cilia (tiny hairs lining the fallopian tubes) that help transport the egg.
•  Scar tissue resulting from endometriosis or abdominal or gynaecological surgery.
•  The use of the intra-uterine contraceptive device (contraceptive “loop”). 
•  Sexually transmitted diseases such as gonorrhoea resulting in infection of the fallopian tubes. 
•  Tubal ligation (having your “tubes tied” to prevent pregnancy) can also leave your Fallopian tubes damaged. 

Your medical history and a pelvic exam are necessary for diagnosing blocked fallopian tubes. The doctor may do a pelvic X-ray called a hysterosalpingogram (HSG). This procedure involves using an injection of dye into the uterine cavity and a simultaneous X-ray of the uterus and tubes, which illustrates the dispersion of dye through the pelvic organs.