All are true about antenatal umbilical aery Doppler except?: (A) Decreased diastolic flow of umbilical aery is suggestive of IUGR, (B) S/D Ratio of umbilical aery is less than S/D ratio of Fetal MCA, (C) S/D Ratio is decreased in smoking females, (D) Reversal of diastolic flow in umbilical aery Doppler suggests impending Fetal demise
Answer is C. S/D Ratio of umbilical aery Doppler is increased in smokers. Decreased, absent or reversal of diastolic flow on umbilical aery Doppler suggests fetal IUGR and impending Fetal death. Fetal MCA S/D ratio is normally more than S/D ratio of umbilical aery. Fetal MCA S/D ratio is less than S/D ratio of umbilical aery Doppler in IUGR.