<prompt> True about antenatal doppler analysis is all exceptReduction in end diastolic flow is associated with poor out comeReduction in EDF is associated with IUGRIn normal gestation placental resistance is highSD ratio is high in IUGR  <response>: C i.e. In normal gestation placental resistance is high Doppler ultrasound analysis in pregnancy The routine use of doppler in pregnancy is constroversialQ. TVS transvaginal sonography is method of choice for monitoring infeility disorders, diagnosis of ectopic pregnancy differentiating abnormal normal 1st trimester pregnancy. The advantages of TVS is that it can be performed in empty bladder and its ability to use higher frequency trandsducer nearer the organs of interst thus providing higher resolution of uterus, ovaries, cul de sac adnexa. - Doppler may prove valuable in assessment of pregnancy complications at risk factusQ. Both fetoplacental uteroplacental circulations can be assessed. As normal pregnancy progresses, placental blood flow increases dt reduction in placental vascular resistanceQ. - Increased placental resistance results in reduced blood flow, manifesting as decreased or absent end diastolic flow. Systolic diastolic SD ratio, resistive pulsatility indices are used to quantify these changes. Increased values of SD ratio R-P indices and reduction in end diastolic flow are associated with IUGR poor fetal outcomeQ. dt fetoplacental insufficiency. Other associations include pregnancy induced hypeension, oligohydramnios, cesarian section for fetal distress. Doppler USG is either continuous wave or duplex pulsed wave. The duplex wave from uterine umblical aeries is useful in assessment of IUGR whereas colour power doppler are invaluable in assessment of fetal hea outflow tracts and other fetal vessels such as intracerebral renal aeries. Although, predictive value of continuous wave doppler for IUGR is relatively low, reversed diastolic flow indicates severely hypoxic fetus. In head spared IUGR, diastolic flow to brain cerebra aery obtained by colour doppler is increased, an indication that the head is spared from the diminished flow to the body. 