Document Detail

Does antenatal ultrasound labelling predict birth order in twin pregnancies?
MedLine Citation:
PMID:  23019097     Owner:  NLM     Status:  Publisher    
Background: It is often assumed by obstetricians, neonatologists and parents alike that the prenatal nomenclature used to identify twins on ultrasound is consistent with twin labelling after their birth. The aim of this study is to use a large regional twin ultrasound database to validate the effectiveness of a scan prior to delivery in predicting twin birth order. Methods: A large regional twin ultrasound database with data from nine hospitals over a ten year period was used to identify all ultrasound examinations carried out just prior to birth. The discordance in twin order between the last scan and birth was evaluated by matching discrepancies in fetal sex and weight. Results: 2103 twin pregnancies with ultrasound EFW and birth weights were assessed. The discrepancy between antenatal labelling and the anticipated birth order was noted in 37.6%, cases (56/149) when judged by sex discordance and in 36% cases (757/2103) by weight discordance. Multiple logistic regression analysis demonstrated that weight discordance, but not chorionicity, scan-to-delivery interval, gestation at scan or gestation at delivery significantly influenced the change in birth order (p<0.001). Conclusion: Antenatal ultrasound labelling does not predict twin birth order in a significant proportion of twin deliveries. This finding should be borne in mind not only by parents, but by physicians when delivering twins discordant for anomalies that are not evident on external examination. Copyright © 2012 ISUOG. Published by John Wiley & Sons, Ltd.
Francesco D'Antonio; Thiran Dias; Basky Thilaganathan;
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-27
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  -     ISSN:  1469-0705     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 ISUOG. Published by John Wiley & Sons, Ltd.
Fetal Medicine Unit, Division of Developmental Sciences, St George's University of London, London, UK.
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