IGF1R and congenital heart disease: Both loci include multiple potential candidate genes, including IGF1R, CNTNAP2, and DPP6, all are well‐studied genes that are strongly associated with developmental and speech delays, congenital heart disease, epilepsy, diaphragmatic hernia, renal anomalies, and ID (Lin et al., 2013; Penagarikano et al., 2011; Yang et al., 2018).