Among the following, the most sensitive antenatal USG finding of Trisomy 21 is:: (A) Absent nasal bone, (B) Thickened nuchal fold, (C) Sho femur, (D) Echogenic bowel
Answer is B. Prenatal USG markers of Down syndrome- Thickness of nuchal fold (75% sensitive) Absence of nasal bone (58% sensitive) cardiac abnormalities, duodenal atresia, shoened femur, shoened humerus, echogenic bowel