Gynaecology & Obstetrics 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 💡 Explanation The double decidual sac sign (DDSS) is the best method for ultrasound diagnosis of ✓ Correct Answer: D. Normal pregnancy