The following views should be paid more attention in examination: transverse view of fetal upper abdomen, fetal four chamber view, fetal left and right ventricular outflow tracts views, fetal short axis view of great artery as well as aortic arch view.

• 检查中着重观察胎儿腹部切面、儿四腔心切面、儿左右室流出道长轴或大动脉短轴切面、儿主动脉弓长轴切面。