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Pregnancy
Gestational Age
Pregnancy, Multiple
Fetofetal Transfusion
Arterio-Arterial Fistula
Fetal Diseases
Ultrasonography, Prenatal
Ultrasonography, Doppler
Monozygotic Twins
Newborn Infant
Twins
Pregnancy Outcomes
Retrospective Studies
Prospective Studies
Reproducibility of Results
Chorion
Placenta
Middle Cerebral Artery
Umbilical Arteries
Contrast Media
Co-Publications
15
8
4
3
2
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