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Pregnancy
Gestational Age
Ultrasonography, Prenatal
Ultrasonography, Doppler
Prenatal Diagnosis
Three-Dimensional Imaging
Cross-Sectional Studies
Prospective Studies
First Pregnancy Trimester
Reference Values
Reproducibility of Results
Second Pregnancy Trimester
Observer Variation
Third Pregnancy Trimester
Blood Flow Velocity
Young Adult
Newborn Infant
Fetal Diseases
Brazil
Fetuses
Co-Publications
101
85
28
21
18
10
9
8
6
5
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