Advanced maternal age and risk of adverse perinatal outcome among women with congenital heart disease: A nationwide register‐based cohort study

Background Women with maternal congenital heart disease have a higher risk of preterm birth (PTB) and giving birth to a small for gestational age (SGA) infant. Advanced maternal age (≥35 years) likewise increases the risk of PTB and SGA, probably explained by poorer cardiovascular status. It is likely that advanced maternal age is particularly detrimental in women with congenital heart disease. Objectives We aimed to determine whether the...