Answer:
The fallopian tube is the most likely place for implantation, because this is the natural path of travel for the sperm. Ectopic pregnancies in different regions of the fallopian tube suggest that the egg gets implanted immediately after fertilization. Abdominal pregnancy is especially unusual, because this is not a normal path for the fertilized egg to take. The cervical pregnancy looks like the fertilized egg transplanted much farther down than normal.
Explanation: From pluto :)