“…Data is sparse regarding the overall ascertainment of fetal echocardiography leading to a diagnosis of aneuploidy, and there are few or no studies regarding fetuses with aneuploidy assessed by other means, and their subsequent echocardiographic findings (Pavlicek et al, 2019;Tuuli et al, 2009). In addition to the expanded prenatal diagnosis of aneuploidy syndromes with frequent CHDs, postnatal diagnosis of the most severe CHDs in CCHD newborn screening programs has grown rapidly worldwide (Bakker et al, 2019;Liberman et al, 2014;Oster et al, 2016 Smallhorn, & Freedom, 1990Wylie et al, 1994Lin et al, 2007Polli et al, 2014Kosiv, Gossett, Bai, & Collins, 2017Domingo, Carey, Eckhauser, Wilkes, & Menon, 2019Van Praagh et al, 1989Musewe et al, 1990Balderston, Shaffer, Washington, & Sondheimer, 1990Baty et al, 1994Crider, Olney, & Cragan, 2008Savva, Walker, & Morris, 2010Kosiv et al, 2017Abdelgadir, Nowaczyk, & Li, 2013Kehinde et al, 2014Bergstrom et al, 2016Pfitzer et al, 2018;Freeman et al, 2008Lange, Guenther, Busch, Hess, & Schreiber, 2007de Graaf et al, 2015 Prevalence of syndrome per 10,000 livebirths Abbreviations: AVSD, atrioventricular septal defect; BAV, bicuspid aortic valve; CHD, congenital heart defect; ETA, elongation of the transverse aorta; HLHS, hypoplastic left heart syndrome; LB, livebirth; PLSVC, persistent left superior vena cava; TAPVC, total anomalous pulmonary venous connection. disability, and high mortality.…”