No abstract available
MeSH terms
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Congenital Abnormalities / diagnosis
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Congenital Abnormalities / epidemiology
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Congenital Abnormalities / prevention & control
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Female
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Fetal Diseases / diagnosis*
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Fetal Diseases / epidemiology
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Fetal Diseases / prevention & control
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Gestational Age
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Humans
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Mass Screening / methods
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Mass Screening / standards
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Pregnancy
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Prenatal Diagnosis / methods*
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Sensitivity and Specificity
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Ultrasonography / standards*