ABSTRACT ‘Observation of fetal behavior reflects the functioning of the central nervous system, and behavioral assessment of the fetus enables the function of the brain to be examined’. 1 The introduction of four-dimensional (4D) sonography techniques would facilitate fetal behavioral assessment in three dimensions in real time during pregnancy. We describe the latest 4D sonographic studies on fetal neurobehavior in all three trimesters of pregnancy. 4D sonography also facilitated the evaluation of interhuman contact and intrapair stimulation in twin pregnancies in utero . This novel technique may assist in the evaluation of fetal neurobehavior and intertwin contact and intrapair stimulation and offer potential advantages relative to conventional two-dimensional sonography. 4D sonography may become an important modality in future research on fetal neurobehavioral development and the prenatal identification of severely brain-damaged infants. How to cite this article Hata T, Sato M, Kanenishi K, Hanaoka U, Tanaka H. 4D Sonography in Assessment of Fetal Neurobehavior. Donald School J Ultrasound Obstet Gynecol 2012;6(2):121-131.
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