In a normal pregnancy, an egg released by your ovary is fertilised in one of your fallopian tubes and travels to your womb where it implants in the womb lining. If you have an ectopic pregnancy, it means the fertilised egg has implanted somewhere other than in your womb. It is most likely to happen in one of your fallopian tubes (called a tubal pregnancy). However, the fertilised egg can also implant at the point where your fallopian tube meets your womb, on one of your ovaries, at the neck of your womb (cervix), or in your abdomen. Ectopic pregnancy occurs in about 1 in 100 pregnancies.
Attribution: BUPA