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Ultrasonography, Prenatal
Amniocentesis
Pregnancy
Gestational Age
Fetal Diseases
Trisomy
Pregnancy, High-Risk
Neural Tube Defects
Vasa Previa
Prospective Studies
Second Pregnancy Trimester
Retrospective Studies
Sensitivity and Specificity
Pregnancy Outcomes
Magnetic Resonance Imaging
First Pregnancy Trimester
Image Processing, Computer-Assisted
Fetal Heart
Fetuses
Chromosomes, Human, Pair 18
Co-Publications
22
11
9
7
5
3
2
1
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