Radiology Which one of the following regarding antenatal assessment of umbilical aeries by Color Doppler studyis TRUE? A There is decreased S/D ratio in smoker and nicotine abusing pregnant females B The reduced diastolic flow at term indicates good prognosis C The flow velocities and the S/D ratio are useful to evaluate high risk pregnancies D In otherwise normal pregnancies the increased S/D ratio is normal in smoking females 💡 Explanation Which one of the following regarding antenatal assessment of umbilical aeries by Color Doppler studyis TRUE? ✓ Correct Answer: C. The flow velocities and the S/D ratio are useful to evaluate high risk pregnancies