Fetal Aortic Blood Flow Velocity and Power Doppler Profiles in the First Trimester: A Comprehensive Study Using High-Definition Flow Imaging oleh Yi-Cheng Wu, Ching-Hsuan Chen, Hsin-Tzu Lu, Yu-Li Lee, Pi-Yu Chen, Ting-Yu Wu, Ming-Hsun Tien, Chiung-Hui Wu, Jack Yu-Jen Huang, Ching-Hua Hsiao, Woei-Chyn Chu