Original research article: Assessing the risk of preterm birth for newborns with congenital heart defects conceived following infertility treatments: a population-based study

To quantify the risk of preterm birth (PTB) for newborns with congenital heart defects (CHDs) conceived following infertility treatments, and to examine the role of multiple pregnancies in the association between infertility treatments and PTB for newborns with CHD