Journal
BJOG-AN INTERNATIONAL JOURNAL OF OBSTETRICS AND GYNAECOLOGY
Volume 121, Issue 11, Pages 1351-1358Publisher
WILEY
DOI: 10.1111/1471-0528.12677
Keywords
Birthweight; body mass index; large for gestational age; pre-eclampsia
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ObjectiveTo assess whether the reported excess of large for gestational age (LGA) neonates in pre-eclamptic women delivering at term is attributable to maternal obesity. Design, setting and populationPopulation-based observational study including 77294 singleton pregnancies registered in the Medical Birth Registry of Norway between 2007 and 2010. MethodsComparison of birthweight percentiles and z-scores between women with and without pre-eclampsia. Main outcome measuresOdds ratio (OR) of LGA and z-scores of birthweight in relation to pre-eclampsia. ResultsPre-eclamptic women delivering at term had increased risk of having LGA neonates. Unadjusted ORs with 95% confidence interval (95% CI) of LGA above the 90th and 95th birthweight centiles were 1.4, 95% CI 1.2-1.6 and 1.6, 95% CI 1.3-1.9, respectively. The excess of LGA persisted after including gestational diabetes and diabetes types 1 and 2 in a multivariate analysis (corresponding ORs 1.3, 95% CI 1.1-1.5 and 1.4, 95% CI 1.2-1.7), but disappeared after adjusting for maternal prepregnant body mass index (ORs 1.1, 95% CI 0.9-1.2 and 1.1, 95% CI 0.9-1.3). ConclusionsThis study suggests accelerated fetal growth in a subset of pre-eclamptic women delivering at term. The excess of LGA neonates is attributable to maternal obesity among pre-eclamptic women delivering at term. The maternal obesity epidemic may lead to an increased prevalence of both pre-eclampsia and LGA neonates among women delivering at term.
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