Ectopic pregnancy most commonly occurs in which part of the female reproductive system?

Ectopic pregnancy most commonly occurs in the fallopian tubes because this is where fertilization typically takes place and where an embryo should ideally travel to implant in the uterus. When fertilization occurs and the resulting embryo fails to move properly to the uterus, it may implant in the fallopian tube itself. This situation leads to an ectopic pregnancy, which poses risks to the mother as the developing tissue can cause the tube to rupture, resulting in severe complications.

The other options represent different areas of the reproductive system but are not the primary sites for ectopic pregnancies. The uterus is where normal implantation occurs; the ovaries are where eggs are produced; and while ectopic pregnancies can occur in the cervix, these cases are rare compared to those in the fallopian tubes. Thus, understanding the physiological processes of the female reproductive system clarifies why the fallopian tubes are the most common site for ectopic pregnancies.