Distribution of the pregnancy cases and births in the three groups
| Total | Crohn's disease | Ulcerative colitis | IBD unclassified | |
| Total pregnancies | 215 | 163 | 47 | 5 |
| Group A* | 86 (39.6%) | 71 (43.5%) | 13 (27.7%) | 2 (40.0%) |
| Group B* | 84 (38.7%) | 54 (33.2%) | 28 (59.6%) | 2 (40.0%) |
| Group C* | 45 (20.7%) | 38 (23.3%) | 6 (12.7%) | 1 (20.0%) |
| Live births (%)† | 138 | 103 | 31 | 4 |
| 64.2% | 63.2% | 65.9% | 80.0% | |
| (57.9% to 70.6%) | (55.8% to 70.6%) | (52.4% to 79.5%) | (44.9% to 100.0%) | |
| Twins | 4 | 4 | 0 | 0 |
| Newborns | 142 | 107 | 31 | 4 |