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To investigate flow in the ductus venosus at 11–13 + 6 weeks of gestation in women with normal pregnancies in the Taiwanese population.Two hundred and fifty-two normal singleton pregnancies with gestational ages ranging from 11 to 13 + 6 weeks were examined in this study. The pulsatility index for veins (PIV), resistance index (RI), peak velocity during ventricular systole (S-wave), and peak velocity...
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