No abstract available
MeSH terms
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Amniotic Fluid / analysis
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Anencephaly / diagnosis
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Central Nervous System / abnormalities
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Central Nervous System / embryology*
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Encephalocele / diagnosis
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Female
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Humans
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Hydrocephalus / diagnosis
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Methods
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Pregnancy
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Pregnancy Trimester, Second
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Prenatal Diagnosis*
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Spinal Dysraphism / diagnosis
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Ultrasonics / instrumentation
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Ultrasonography*
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alpha-Fetoproteins / analysis