Final answer:
The highest frequency of ectopic pregnancies is found in the Fallopian tube, particularly the ampullary section of it, accounting for about 80% of all cases.
Step-by-step explanation:
Ectopic pregnancies are those that implant and begin to develop outside of the normal uterine cavity. The anatomical location with the highest frequency of ectopic pregnancies is the Fallopian tube. Specifically, the ampullary section of the fallopian tube has the highest incidence, accounting for about 80% of all ectopic pregnancies. Patient's with a history of Pelvic Inflammatory Disease (PID), previous ectopic pregnancy, or surgery on the fallopian tube have increased risk for an ectopic pregnancy.
Learn more about Ectopic pregnancies