No abstract available
Publication types
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Letter
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Meta-Analysis
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Comment
MeSH terms
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Cervical Length Measurement
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Female
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Humans
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Infant, Newborn
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Pregnancy
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Premature Birth* / epidemiology
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Premature Birth* / etiology
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Premature Birth* / prevention & control
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Progesterone*
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Progestins / adverse effects
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Reproducibility of Results