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Representative Doppler waveforms for a case with discordant umbilical artery pulsatility indices (Subject 5 in Table 2). A, The umbilical artery pulsatility index of one of the umbilical arteries is higher than the 95th centile for gestational age. B and C, The pulsatility indices of the second umbilical artery and the descending aorta are normal (10–90th centile for gestational age).
