<prompt> Which of the following is the commonest site of ectopic pregnancy?IsthmusAmpullaIntestitialInfundibulum  <response>: The frequency of location of tubal ectopic pregnancy are : 55 in ampulla, 25 in isthmus, 18 in infundibulum and 2 in the interstitial segment of fallopian tube. Ref: Textbook of Obstetrics By D C Dutta, 6e page 179. 