An ectopic pregnancy occurs when the fertilized egg implants in
tissue outside of the uterus, and the placenta and fetus begin
to develop there. The most common site is within a fallopian
tube; however, ectopic pregnancies can occur in the ovary, the
abdomen, and the lower portion of the uterus (the cervix).
Harvey Simon, MD, Editor-in-Chief, Associate Professor of
Medicine, Harvard Medical School; Senior Physician,
Massachusetts General Hospital. The information provided herein
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