To examine the association between interpregnancy weight change and the risk for adverse maternal and neonatal outcomes.
All live-born singleton births delivered at 21–42 weeks of gestation in women who had their first two consecutive births between 2009 and 2011 in Flanders (the northern part of Belgium) and who were included in the Study Center for Perinatal Epidemiology database (N=7,897) were included. Interpregnancy weight change was calculated as the difference between the prepregnancy body mass index (BMI) of the first pregnancy and the prepregnancy BMI of the second pregnancy. Multivariate logistic regression analysis to predict gestational diabetes mellitus, pregnancy-induced hypertension, cesarean delivery, macrosomia (4,000 g or greater), low birth weight (less than 2,500 g), and congenital malformations were performed.
The adjusted odds ratio (OR) for gestational diabetes mellitus was 2.25 (95% confidence interval [CI] 1.33–3.78; P=.002) for interpregnancy weight retention of 2 or more BMI units, and the adjusted OR for pregnancy-induced hypertension was 3.76 (95% CI 2.16–6.57; P<.001) with an increase of 3 or more BMI units between pregnancies, but these associations were only present in underweight and normal-weight women. In overweight and obese women, the adjusted OR was 2.04 (95% CI 1.41–2.95; P<.001) for cesarean delivery for an interpregnancy weight retention of 2 or more BMI units. In underweight and normal-weight women, the risk for macrosomia was halved if women lost more than 1 BMI unit between pregnancies, but at the same time, the risk for low birth weight doubled.
We show that weight retention between the first and second pregnancy is associated with an increased risk for perinatal complications, even in underweight and normal-weight women. Stabilizing interpregnancy weight appears an important target for reducing adverse perinatal outcomes in a second pregnancy.
Stabilizing interpregnancy weight for all women is an important target for reducing diabetes, hypertension, cesarean delivery, and adverse neonatal outcomes in a second pregnancy.
KHLim, Limburg Catholic University College, PHL University College, Department of Healthcare Research, Hasselt, the Departments of Psychology and Development and Regeneration, KU Leuven, the Center of Human Genetics, University Hospitals Leuven, and the Department of Obstetrics & Gynaecology—Division of Mother & Child, University Hospitals, Leuven, and the Department of Welfare, Public Health and Family, Flemish Government, and the Flemish Study Center for Perinatal Epidemiology, Brussels, Belgium; and the Department of Psychology, Tilburg University, Tilburg, The Netherlands.
Corresponding author: Roland Devlieger, PhD, Department of Obstetrics and Gynaecology, University Hospitals Leuven, Herestraat, 49, 3000 Leuven, Belgium; e-mail: email@example.com.
The Study Center for Perinatal Epidemiology is financed and commissioned by the Flemish Centre for Care and Health (Agentschap Zorg en Gezondheid). Annick Bogaerts was supported by a PWO project from Flanders. Bea R. H. Van den Bergh is funded by The Netherlands Organisation for Scientific Research (NWO; Brain and Cognition Program; 2008-2012) and by the EU 7th Framework Program (FP7-Health-2011; BrainAGE; 2012-2017). Roland Devlieger is senior clinical researcher for FWO Flanders (2010-2015).
The authors thank the Flemish Study Center for Perinatal Epidemiology for their contribution in providing all the data as well as the University of Ghent for matching the data; Ir. Guy and Evelyne Martens for coordinating the study; and Marianne Mead for her review of the paper and her linguistic advice.
Presented in part at the 60th Annual Meeting of the Society for Gynecologic Investigation, March 20–23, 2013, Orlando, Florida.
Financial Disclosure The authors did not report any potential conflicts of interest.