This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ecotopic Pregnancy, Subject name: Gynaecology & Obstetrics
The cause of fetal death in ectopic pregnancy is postulated as: 
Select and explain. 
A. Vascular accident, B. Nutritional adequacy, C. Endocrine insufficiency, D. Immune response to mother
A: Vascular accident
Answer: A: Vascular accident 
Explanation: Ans. is a, i.e. Vascular accidentRef Williams Gynae 1/e, p 158Ectopic pregnancy is the leading cause of early pregnancy related deaths.Most common cause of death in ectopic pregnancy is tubal rupture - severe hemorrhage - death.Ectopic pregnancy can have 2 outcomes:1. Tubal abortion - M/C outcome. It is most common outcome of ectopic pregnancy in ampulla2. Tubal rupture-ectopic pregnancy of isthmus are the ones which usually rupture.