In an ectopic pregnancy, where is the fertilized ovum implanted?

In an ectopic pregnancy, the fertilized ovum is implanted outside the uterus, which is why the answer is correct. Typically, an ectopic pregnancy occurs in one of the fallopian tubes, but it can also take place in other locations such as the cervix, ovary, or abdominal cavity.

The term "ectopic" specifically refers to implantation occurring in an abnormal location, which is essential because it can lead to serious complications for the pregnant individual. It’s important to understand that while there are various potential sites for ectopic pregnancies, the defining characteristic is that they occur outside of the normal uterine environment, where the fetus would typically grow to term.

Thus, the correct answer highlights the abnormal implantation that characterizes this condition.