No abstract available
MeSH terms
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Adult
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Birth Injuries / epidemiology*
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Congenital Abnormalities / epidemiology*
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Female
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Fetal Death / epidemiology
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Gestational Age
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Humans
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Illegitimacy
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Infant Mortality
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Infant, Newborn
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Infant, Premature
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Male
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Maternal Age
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Maternal Health Services
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Nurseries, Hospital
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Obstetric Labor Complications / epidemiology
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Obstetric Labor, Premature / epidemiology
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Parity
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Pennsylvania
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Pregnancy
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Pregnancy Complications / epidemiology*
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Prenatal Care*
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Racial Groups
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Seasons
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Sex Factors
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Socioeconomic Factors