The double decidual sac sign (DDSS) is the best method for ultrasound diagnosis of: (A) Monoamniotic Dichorionic twins, (B) Diamniotic dichorionic twins, (C) Ectopic pregnancy, (D) Normal pregnancy
Answer is D. Double decidual sac sign on USG - Intra-uterine sac (Eccentrically placed) Outer layer - Decidua Parietalis Inner layer - Decidua Capsularis Indicates - Intrauterine pregnancy Intradecidual ring sign is the first sign of pregnancy on USG.