Singh, Sachin KumarMurarka, Anand kr2015-04-182015-04-182014-03Singh Sachin Kumar, Murarka Anand kr. Study of Systolic/Diastolic Ratios of the Umbilical Artery Flow Velocity Waveforms in Pregnant Women. Indian Medical Gazette. 2014 Mar ; 148 (3): 93-96.http://imsear.searo.who.int/handle/123456789/157593Analysis of umbilical artery flow velocity waveforms of systolic/diastolic (S/D) ratio of 58 patients, who had accurately uncomplicated pregnancies with a normal spontaneous vaginal delivery, were studied. This study includes conventional ultrasonography, color flow mapping and duplex Doppler flow. There was a significant decrease in the S/D ratio over each week of the third trimester of pregnancy. The study present the mean, range and upper limit of the data obtained in this population.enumbilical artery flow velocity waveformscolor flow mappingcolor flow mapping;duplex dopplerBlood Flow VelocityDiastoleFemaleGestational AgeHeart Rate --physiologyHumansPregnancySystoleUltrasonography, PrenatalUltrasonography, Doppler, ColorUmbilical Arteries --physiologyUmbilical Arteries --ultrasonographyArticle