Functional diagnostic groups
| Functional diagnostic group | Number of pregnancies with corresponding maternal lesion (figures in brackets represent the number of women) | Total number of pregnancies (figures in brackets represent the number of women) |
| Left heart obstruction | Repaired coarctation 154 (112) Mitral stenosis 35 (28) Aortic stenosis 81 (66) Subaortic stenosis 41 (29) | 311 (235) |
| Left heart regurgitation | Aortic regurgitation 21 (18) Mitral regurgitation 39 (28) | 60 (47) |
| Right heart obstruction | Pulmonary stenosis 73 (55) | 73 (55) |
| Right heart regurgitation | Pulmonary regurgitation 22 (17) Ebstein anomaly 14 (12) Tricuspid regurgitation 7 (7) | 43 (36) |
| Rhythm disturbance | Long QT 22 (14) Atrial ectopic tachycardia 4 (4) CPVT* 6 (5) Heart block paced 18 (16) Atrial tachycardia 11 (10) Paroxysmal atrial fibrillation 3 (3) Brugada syndrome 3 (3) Paroxysmal ventricular tachycardia 3 (3) Other 12 (9) | 82 (67) |
| Marfan syndrome | Marfan (57) | 76 (57) |
| Repaired tetralogy of Fallot | Tetralogy of Fallot 142 (108) | 142 (108) |
| Cardiomyopathy | Dilated cardiomyopathy (1) Idiopathic 41 (39) (2) Doxorubicin induced 9 (7) Hypertrophic cardiomyopathy 31 (28) Non-compaction 2 (2) Arrthymogenic right ventricle cardiomyopathy 5 (5) | 88 (81) |
| No residual lesion | Repaired atrial septal defect 48 (41) Repaired ventricular septal defect 34 (29) Bicuspid aortic valve 17 (14) Patent ductus arteriosus closure 5 (5) | 113 (92) |
| Left-to-right shunt | Atrial septal defect 58 (48) Ventricular septal defect 55 (42) Patent ductus arteriosus 8 (8) Patent foramen ovale 6 (6) | 127 (104) |
| Previous peripartum cardiomyopathy (PPCM) | PPCM 26 (22) | 26 (22) |
| Systemic right ventricle | D transposition (mustard/senning) 65 (53) L transposition-ccTGA 15 (13) | 80 (68) |
| Pulmonary arterial hypertension (PAH) | Idiopathic PAH 5 (2) PAH with ventricular septal defect 13 (9) PAH with other congenital heart disease 6 (4) Other 6 (3) | 27 (18) |
| Previous coronary heart disease | Ischaemia heart disease 15 (15) | 15 (15) |
| Fontan circulation | Atriopulmonary Fontan 8 (5) Lateral tunnel 7 (4) Total cavopulmonary circulation Fontan 14 (10) | 29 (19) |
| Prosthetic valve | Mechanical mitral 16 (13) Mechanical aortic 9 (9) Bioprosthetic aortic 6 (6) Bioprosthetic mitral 1 (1) | 32 (29) |
*Catecholaminergic polymorphic ventricular tachycardia.