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Figure 4: Spectral Doppler in the ductus arteriosus at 36 weeks gestation after 1 month of maternal hyperoxygenation demonstrating moderate ductus arteriosus restriction, with a peak instantaneous gradient of 35 mmHg

Figure 4: Spectral Doppler in the ductus arteriosus at 36 weeks gestation after 1 month of maternal hyperoxygenation demonstrating moderate ductus arteriosus restriction, with a peak instantaneous gradient of 35 mmHg