No abstract available
MeSH terms
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Female
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Fertilization in Vitro / statistics & numerical data*
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Gestational Age
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Humans
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Infant, Low Birth Weight
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Infant, Newborn
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Obstetric Labor, Premature / epidemiology*
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Obstetric Labor, Premature / etiology
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Pregnancy
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Pregnancy, Multiple / statistics & numerical data*
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Risk
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Sweden
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United Kingdom