| Reference range for cervical length in twin pregnancies. | |
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MedLine Citation:
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PMID: 12225302 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Twin pregnancies are at increased risk of preterm delivery, and cervical length measurement by transvaginal ultrasound examination has been shown to be an effective method of screening for this complication. The aim of the present study is to establish a reference range for cervical length measurement throughout gestation in twin pregnancies. METHODS: Prospective study involving 144 nonselected twin pregnancies that delivered after 34 weeks and underwent ultrasound examination every 4 weeks for transvaginal measurement of cervical length. Mean cervical length measurements, 95% confidence intervals for the estimate and 95% prediction intervals were established throughout gestation by linear regression analysis. RESULTS: There was a significant correlation between cervical length measurements and gestational age [cervical length (mm) = - 0.758 * gestation age (weeks) + 56.69, r=- 0.43, p < 0.0001], and mean cervical length shortened by approximately 0.8 mm per week, from 47 mm at 13 weeks to 32 mm at 32 weeks. The corresponding lower limits for the 95% prediction intervals were 29 and 15 mm, respectively. CONCLUSION: Cervical length shortens gradually throughout gestation in twin pregnancies. |
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Authors:
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Mariza M Fujita; Maria de Lourdes Brizot; Adolfo W Liao; Tatiana Bernáth; Luciana Cury; Jorge D Banduki Neto; Marcelo Zugaib |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta obstetricia et gynecologica Scandinavica Volume: 81 ISSN: 0001-6349 ISO Abbreviation: Acta Obstet Gynecol Scand Publication Date: 2002 Sep |
Date Detail:
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Created Date: 2002-09-12 Completed Date: 2002-10-11 Revised Date: 2005-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0370343 Medline TA: Acta Obstet Gynecol Scand Country: Denmark |
Other Details:
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Languages: eng Pagination: 856-9 Citation Subset: IM |
Affiliation:
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Department of Obstetrics, Hospital das Clinicas, São Paulo University Medical School, Rua Dr Enéas de Carvalho Aguiar, 225 São Paulo, SP, Brazil 05403-000. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cervix Uteri
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anatomy & histology*,
ultrasonography* Female Gestational Age Humans Infant, Newborn Infant, Premature Obstetric Labor, Premature Pregnancy Pregnancy, Multiple* Prospective Studies Reference Values Regression Analysis Risk Factors Sensitivity and Specificity Twins Ultrasonography, Prenatal* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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