In a normal pregnancy, the egg after fertilization with the sperm gets implanted in the wall of the uterus. The uterus becomes the home for the fertilized egg to develop into a fetus over the next nine months. But in some women, the fertilized egg instead of getting implanted in the wall of the uterus may get implanted in one of the fallopian tubes which connect the ovary to the uterus. It may also get implanted on the ovaries, outside the uterus. This is then called Ectopic pregnancy. So an ectopic or tubal pregnancy is a pregnancy that develops outside the uterus.