Distribution of maternal congenital heart disease (CHD) of 117 patients by primary lesion
| Congenital lesion | No (%) |
| Non-severe disease | 75 (64.1) |
| Atrial septal defect | 17 |
| Ventricular septal defect | 11 |
| Patent ductus arteriosus | 3 |
| Partial anomalous pulmonary venous return | 4 |
| Coarctation of the aorta, repaired | 7 |
| Aortic valve disease±bicuspid aortic valve | 19 |
| Pulmonary stenosis | 10 |
| Double chamber right ventricle | 2 |
| Tricuspid valve stenosis | 1 |
| Subaortic stenosis | 1 |
| Severe disease | 42 (35.9) |
| Interrupted aortic arch | 1 |
| Pulmonary arterial hypertension with CHD | 1 |
| Tetralogy of Fallot | 18 |
| Transposition of the great arteries (8 D-loop, repaired; 3 L-loop, unrepaired) | 14 |
| Double outlet right ventricle | 2 |
| Truncus arteriosis | 2 |
| Univentricular physiology | 4 |