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Ultrasonography of a fetus at 13 weeks’ gestation by a transabdominal high-frequency linear transducer: (a) transverse view of fetal brain, (b) coronal view of face showing both orbits (OB), (c) coronal view of abdomen showing both kidneys (Ki) on either side of the spine, and (d) the three-vessel trachea transverse view with color Doppler showing pulmonary artery (PA), aorta (Ao), superior vena cava (SVC), and trachea (T).
