“…9 Only a single study has investigated the association between maternal age, congenital heart disease, and neonatal outcomes 28 while other studies have included maternal age as a predictor of neonatal outcomes. 3,29 Furenäs et al 28 To some extent, it is questioned whether the effect of maternal age on adverse neonatal outcome is due to biology or due to selection. 30 Advanced maternal age has been associated with a range of adverse pregnancy outcomes showing the same shape of increase in risk across different outcomes 9,26,31,32 which might indicate a biologic explanation.…”