Blighted ovum is:: (A) Synaptic knobs, (B) Avascular villi, (C) Intervillous hemorrhage, (D) None of the above
Answer is B. In missed aboion ultrasound will show a gestational sac smaller than expected with irregular and crenated margin. An embryonic pregnancy (blighted ovum )is considered when there is a gestational sac more than 16 mm in diameter without a foetal node.(refer pgno:146 sheila 2 nd edition)