No abstract available
MeSH terms
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Birth Certificates*
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Child Welfare*
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Data Collection / methods
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Data Collection / standards*
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Female
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Health Surveys*
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Humans
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Infant, Newborn
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Maternal Welfare*
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National Center for Health Statistics, U.S.
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Parity
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Pregnancy
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Pregnancy Outcome
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Prenatal Care / statistics & numerical data
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Socioeconomic Factors
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United States / epidemiology