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The effect of twin-to-twin delivery time intervals on neonatal outcome for second twins.

Journal article
Authors Linnéa Lindroos
Anders Elfvin
Lars Ladfors
Ulla-Britt Wennerholm
Published in BMC pregnancy and childbirth
Volume 18
Issue 1
Pages 36
ISSN 1471-2393
Publication year 2018
Published at Institute of Clinical Sciences, Department of Pediatrics
Institute of Clinical Sciences, Department of Obstetrics and Gynecology
Pages 36
Language en
Links dx.doi.org/10.1186/s12884-018-1668-...
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Pediatrics

Abstract

The objective was to examine the effect of twin-to-twin delivery intervals on neonatal outcome for second twins.This was a retrospective, hospital-based study, performed at a university teaching hospital in Western Sweden. Twin deliveries between 2008 and 2014 at ≥32 + 0 weeks of gestation, where the first twin was delivered vaginally, were included. Primary outcome was a composite outcome of metabolic acidosis, Apgar < 4 at 5 min or peri/neonatal mortality in the second twin. Secondary outcome was a composite outcome of neonatal morbidity.A total of 527 twin deliveries were included. The median twin-to-twin delivery interval time was 19 min (range 2-399 min) and 68% of all second twins were delivered within 30 min. Primary outcome occurred in 2.6% of the second twins. Median twin-to-twin delivery interval was 34 min (8-78 min) for the second twin with a primary outcome, and 19 min (2-399 min) for the second twin with no primary outcome (p = 0.028). Second twins delivered within a twin-to-twin interval of 0-30 min had a higher pH in umbilical artery blood gas than those delivered after 30 min (pH 7.23 and pH 7.20, p <  0.0001). Secondary outcome was not associated with twin-to-twin delivery interval time. The combined vaginal-cesarean delivery rate was 6.6% (n = 35) and the rate was higher with twin-to-twin delivery interval >  30 min (p <  0.0001).An association, but not necessarily a causality, between twin-to-twin delivery interval and primary outcome was seen. An upper time limit on twin-to-twin delivery time intervals may be justified. However, the optimal time interval needs further studies.

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