What is the definition of an ectopic pregnancy?

The correct definition of an ectopic pregnancy is that it occurs when a fertilized egg implants outside of the uterus. This typically happens in the fallopian tubes, although it can also occur in other locations such as the cervix, ovary, or abdominal cavity. Ectopic pregnancies cannot proceed normally and can pose serious health risks to the individual, as they may lead to internal bleeding and other complications.

In contrast, other options describe different scenarios that do not meet the criteria for an ectopic pregnancy. For instance, when a fertilized egg implants within the uterus, it represents a normal pregnancy. Similarly, while the statement about the fertilized egg not being detected in the uterus is somewhat accurate in certain contexts, it does not specifically define ectopic pregnancy. Finally, if a fertilized egg develops in the cervix, it is still classified under ectopic pregnancies but specifically indicates a unique and less common location rather than the general definition. The key takeaway is that ectopic pregnancy specifically refers to implantation outside the uterine cavity.