No abstract available
MeSH terms
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Amniotic Fluid / analysis*
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Embryonic and Fetal Development*
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Female
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Gestational Age
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Humans
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Hyaline Membrane Disease / etiology
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Infant, Newborn
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Lung / embryology*
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Methods
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Phosphatidylcholines / analysis*
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Pregnancy
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Pregnancy Complications
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Respiratory Distress Syndrome, Newborn / etiology
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Sphingomyelins / analysis*
Substances
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Phosphatidylcholines
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Sphingomyelins