Abstract
Copyright © 2012. Korean Society of Obstetrics and Gynecology Placental vascularization is important for normal pregnancy. The circulatory function of the placenta appears at an early stage of embryo-placental development and is strongly related to fetal growth, placental volume, and uterine blood flow. Therefore, adequate placental angiogenesis is critical for the establishment of normal placental vascularization with subsequent normal development of the fetus [1,2]. Recent advances in technology allow the combination of 3-dimensional (3-D) ultrasound with power Doppler, making it possible to quantify Doppler signals in a volume obtained by 3D scanning and allowing investigation of the placental circulation. Each calculation of the vascularization index (VI), flow index (FI), and vascularization-flow index (VFI) is defined through technological quantification, and these indices are thought to reflect the number of vessels within the volume of interest, the intensity of flow at the time of the 3-D sweep, and both blood flow and vascularization [3]. ORIGINAL ARTICLE Korean J Obstet Gynecol 2012;55(7):454-460 http://dx.doi.org/10.5468/KJOG.2012.55.7.454 pISSN 2233-5188 · eISSN 2233-5196
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