No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Breech Presentation*
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Congenital Abnormalities / diagnosis*
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Congenital Abnormalities / epidemiology
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Female
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Fetal Diseases / diagnosis*
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Fetal Diseases / epidemiology
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Humans
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Labor Presentation*
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Pregnancy