Which is the commonest type of ectopic pregnancy with presented with rupture?

Aboion is common in ampullary pregnancies, whereas rupture is the usual outcome with isthmic pregnancies. As a rule, whenever there is tubal rupture in the first few weeks, the pregnancy is situated in the isthmic poion of the tube. When the feilized ovum is implanted well within the interstitial poion, rupture usually occurs later. Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 10. Ectopic Pregnancy. In F.G. Cunningham, K.J. Leveno, S.L. Bloom, J.C. Hauth, D.J. Rouse, C.Y. Spong (Eds), Williams Obstetrics, 23e.