With the latest advances in color Doppler such as superb microvascular imaging (SMI), radiant flow, HDlive flow, and HDlive flow silhouette, we can obtain more comprehensive blood flow information compared with conventional color Doppler. Radiant flow, HDlive flow, and HDlive flow silhouette are appropriate for assessment of the fetal cardiac anatomy and prenatal diagnosis of a congenital heart anomaly. SMI is superior for the precise evaluation of fetal peripheral blood vessels and placental vasculature. In this review article, we present the latest state-ofthe- art SMI, radiant flow, HDlive flow, and HDlive flow silhouette features of normal and abnormal fetal hearts, fetal peripheral vessels, and placentas. We also discuss the present and future applicability of advanced color Doppler to assess fetal and placental circulations.
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