Gynaecology & Obstetrics Which of the following feature on second trimester ultrasound is not a marker of Down’s syndrome. A Single umbilical aery B Choroid plexus cyst C Diaphragmatic hernia D Duodenal atresia 💡 Explanation Which of the following feature on second trimester ultrasound is not a marker of Down's syndrome. ✓ Correct Answer: B. Choroid plexus cyst