No abstract available
Keywords:
Cervical-length measurement; Preterm labor; Transperineal; Transvaginal; Ultrasound.
MeSH terms
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Cervical Length Measurement / methods*
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Cervix Uteri / diagnostic imaging
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Female
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Humans
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Obstetric Labor, Premature / diagnostic imaging*
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Pregnancy
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Prospective Studies
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Ultrasonography / methods*