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Pregnancy
Pregnancy, Multiple
Gestational Age
Pregnancy, Twin
Ultrasonography, Prenatal
Prenatal Diagnosis
Congenital Heart Defects
Pregnancy Complications
Fetal Diseases
Fetofetal Transfusion
Premature Rupture Fetal Membranes
Retrospective Studies
Risk Factors
Second Pregnancy Trimester
Stillbirth
Perinatal Mortality
Twins
Newborn Infant
Fetal Blood
Fetal Heart
Co-Publications
12
4
3
2
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