| First trimester ultrasound determination of chorionicity in twin pregnancy. | |
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MedLine Citation:
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PMID: 21308842 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVES: To determine the accuracy of ultrasound at 11-14 weeks' gestation in the diagnosis of chorionicity in twin pregnancy. METHODS: A retrospective observational study between 1999 and 2010. At the first trimester routine ultrasound scan, chorionicity was assigned according to the number of placental masses and the T or λ-signs for a single placental mass. Chorionicity was confirmed by histology or discordant sex at birth. RESULTS: A total of 648 pregnancies were assigned chorionicity by first trimester ultrasound during the study period. Chorionicity was ascertained in 613 cases either by histology (n = 340) or discordant sex (n = 273). Chorionicity was correctly assigned by ultrasound at 11-14 weeks in 612 out of 613 pregnancies (accuracy 99.8%) The sensitivity and specificity for determining monochorionicity was 100% and 99.8%, respectively. CONCLUSIONS: First trimester ultrasound can be used to reliably determine chorionicity by noting the number of placental masses and T or λ-signs. Determination of twin chorionicity is important and should be completed in the first trimester. Copyright © 2011 ISUOG. Published by John Wiley & Sons, Ltd. |
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Authors:
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Tiran Dias; Tiziana Arcangeli; Amar Bhide; Raffaele Napolitano; Samina Mahsud-Dornan; Basky Thilaganathan |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-31 |
Journal Detail:
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Title: Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology Volume: - ISSN: 1469-0705 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-2-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9108340 Medline TA: Ultrasound Obstet Gynecol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 ISUOG. Published by John Wiley & Sons, Ltd. |
Affiliation:
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Fetal Medicine Unit, St George's University of London, United Kingdom. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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