The HDlive flow silhouette mode is the latest technology to demonstrate vitreous-like clarity of blood flow and can preserve and delineate the outline and borders of the blood flow while showing its core as semitransparent. Therefore, holographic visualization of the fetal cardiac blood flow can be achieved. We can choose the combination of the HDlive flow or HDlive flow silhouette mode with glass-body rendering mode or HDlive silhouette mode for evaluation of the fetal heart. We can also evaluate the fetal heart from any direction, especially using five special views (frontal, spatial three-vessel, panoramic, posterior, and right lateral views). In this paper, HDlive flow silhouette mode characteristics of the normal fetal heart and congenital heart anomalies are shown using various images. The HDlive flow silhouette mode may help evaluate the normal fetal heart and diagnose congenital heart anomaly during pregnancy as an adjunctive diagnostic tool.