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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
6
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pubmed:dateCreated |
1996-11-22
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pubmed:abstractText |
Chorionicity was prospectively determined in 369 twin pregnancies by ultrasound at 10-14 weeks of gestation. Pregnancies were classified as monochorionic if there was a single placental mass in the absence of the lambda sign at the inter-twin membrane-placental junction, and dichorionic if there was a single placental mass but the lambda sign was present, or the placentas were not adjacent to each other. In 81 (22%) cases, the pregnancies were classified as monochorionic and in 288 (78%) as dichorionic. Pregnancy outcome was available in 279 cases and all 63 of these pregnancies classified as monochorionic resulted in the delivery of same-sex twins. Similarly, all 100 different-sex pairs were correctly classified as dichorionic. These findings demonstrate the high reliability of ultrasound examination at 10-14 weeks of gestation in determining chorionicity in twin pregnancies.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Jun
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pubmed:issn |
0960-7692
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
7
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
421-3
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pubmed:dateRevised |
2004-11-17
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pubmed:meshHeading |
pubmed-meshheading:8807758-Adult,
pubmed-meshheading:8807758-Chorion,
pubmed-meshheading:8807758-Female,
pubmed-meshheading:8807758-Gestational Age,
pubmed-meshheading:8807758-Humans,
pubmed-meshheading:8807758-Predictive Value of Tests,
pubmed-meshheading:8807758-Pregnancy,
pubmed-meshheading:8807758-Pregnancy, Multiple,
pubmed-meshheading:8807758-Pregnancy Outcome,
pubmed-meshheading:8807758-Pregnancy Trimester, First,
pubmed-meshheading:8807758-Reproducibility of Results,
pubmed-meshheading:8807758-Retrospective Studies,
pubmed-meshheading:8807758-Twins,
pubmed-meshheading:8807758-Ultrasonography, Prenatal
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pubmed:year |
1996
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pubmed:articleTitle |
The lambda sign at 10-14 weeks of gestation as a predictor of chorionicity in twin pregnancies.
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pubmed:affiliation |
Harris Birthright Research Centre for Fetal Medicine, King's College Hospital Medical School, London, UK.
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pubmed:publicationType |
Journal Article
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