The uterine tube (fallopian tube) carries an egg from the ovary to the uterus. Unless a biological abnormality, surgery, or ectopic pregnancy caused the loss of one tube, women should have two uterine tubes in their bodies.
Fallopian tube obstruction is a major cause of female infertility. Blocked fallopian tubes are unable to let the ovum and the sperm fuse, thus making fertilization impossible.
The fallopian tubes can sometimes become blocked or even damaged due to certain conditions that a woman may suffer from. In rare cases, the blockage to the fallopian tubes may have been present since birth as a birth defect, but has gone undetected until the woman reached adulthood and tried to conceive