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