Answer:
Pressure by an adhesion on fallopian tubes makes the fertilized eggs to become implanted in fallopian tube itself and leads to ectopic pregnancy.
Step-by-step explanation:
Uterus is the normal site for implantation of fertilized egg. An adhesion allows the fertilized egg to become attached to fallopian tubes and thereby, does not allow it to go to the uterus for implantation. Implantation of a fertilized egg in any organ outside uterus leads to ectopic pregnancy. Most of the ectopic pregnancy results in miscarriages.