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Pregnancy
Gestational Age
Ultrasonography, Prenatal
Cordocentesis
Echocardiography, Doppler
Echocardiography, Four-Dimensional
Ultrasonography, Doppler
Fetal Growth Retardation
Heart Rate, Fetal
Fetal Diseases
Blood Flow Velocity
Pregnancy Outcomes
Fetuses
Umbilical Arteries
Fetal Heart
Fetal Blood
Umbilical Veins
Inferior Vena Cava
Pulsatile Flow
Oxygen
Co-Publications
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61
56
10
6
5
4
3
2
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