This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Gynaecology & Obstetrics
Double decidual sign is seen in? 
Select and explain. 
A. Uterine gestational sac, B. Pseudo gestational sac, C. Threatened Aboion, D. Ectopic pregnancy
A: Uterine gestational sac
Answer: A: Uterine gestational sac 
Explanation: Double decidual sign is seen in Uterine gestational sac Double decidual sac sign on USG - Intra-uterine sac (Eccentrically placed) Outer layer - Decidua Parietalis Inner layer - Decidua Capsularis Indicates - Intrauterine pregnancy