Ectopic pregnancy, in which the gestational sac is outside the uterine cavity, is the most common life-threatening emergency in early pregnancy. Interstitial ectopic pregnancy defined as the ectopic gestation developing in the uterine part of the fallopian tube is rare, occuring in 2-4% of all ectopic pregnancies. It tends to rupture at a more advanced stage of gestation compared to tubal ectopic pregnancy; and when ruptured, hemorrhage is usually profound. The maternal mortality rate of ruptured interstitial pregnancy is 2-5 times higher than that of tubal ectopic pregnancy. Early diagnosis and treatment of interstitial ectopic pregnancy is particularly important because of the high morbidity associated with its rupture.
Keywords: interstitial ectopic pregnancy