The egg is released from the ovary by the process of ovulation. Further, the egg enters the fallopian tubes, where a motile sperm fertilizes it to develop an embryo.
After five days, the 150-celled blastocyst reaches the uterus. For further development,itimplants in the upper portion of the cavity. Eventually, after nine months, the labour begins, and the foetus gets delivered. A woman requires at least one functional, open fallopian tube for natural or artificial pregnancy through insemination.
Conditions like pelvic inflammatory disease, endometriosis, or infection may cause blockage in the fallopian tube. It may obstruct the passage of sperm to the egg, and the way to the uterus for the fertilized egg, resulting in failed conception.