Most common site of ectopic pregnancy in fallopian tube: March 2005
Ans. B: Ampulla The vast majority of ectopic pregnancies implant in the Fallopian tube. Pregnancies can grow in the infundibulum (18% of all ectopics), the ampullary section (55%), the isthmus (25%), and the interstitial pa of the tube (20%). Moality of a tubal pregnancy at the isthmus or within the uterus (interstitial pregnancy) is higher as there is increased vascularity that may result more likely in sudden major internal hemorrhage.
Infundibulum
Ampulla
Isthmus
Interstitium