To the Editor Dr Auger and colleagues1 investigated the association between preeclampsia and congenital heart defects in Canada. A similar study was recently published using a nationwide birth cohort from Norway.2 The fact that 2 independent studies found that preeclampsia was associated with heart defects in newborns in different populations strengthens the confidence in the results.
Brodwall K, Greve G, Øyen N. Preeclampsia and Congenital Heart Defects. JAMA. 2016;315(11):1167-1168. doi:10.1001/jama.2015.19075