Table 3

Number of cases of major CHD antenatally diagnosed at different gestational ages and the total antenatal detection rate

Chromosomally normal (n=30)Chromosomally abnormal (n=10)Total pregnancies (n=40)
*The majority of aneuploid pregnancies were terminated before fetal echocardiography.
Time of diagnosis (weeks)
    <1863*9
    20–2411415
    24–40426
Total antenatal detection rate (%)709075
95% confidence interval51% to 85%56% to 10059% to 87