3D/4D sonography, also known as three-dimensional or four-dimensional ultrasound, is an advanced imaging technique used in prenatal care to provide detailed visualizations of the fetus in the womb. Unlike traditional 2D ultrasound, which produces flat images, 3D ultrasound creates three-dimensional images of the fetus, allowing healthcare providers and expectant parents to see the baby's surface and features more clearly. 4D ultrasound adds the element of time, providing real-time moving images of the fetus, allowing for a dynamic view of the baby's movements, such as facial expressions or body movements. This technology enhances the prenatal bonding experience for parents and allows healthcare providers to better assess certain fetal abnormalities or conditions, although it is not routinely used for diagnostic purposes and is often considered an adjunct to standard prenatal care.