Characteristics and obstetric past history of the women
| All patients (n=204) | Crohn's disease (n=155, 76.0%) | Ulcerative colitis (n=44, 21.5%) | IBD unclassified (n=5, 2.5%) | |
| Age (years) at IBD diagnosis* | 22.1 (7.0–38.0) | 21.5 (7.0–38.0) | 24.2 (13.0–38.0) | 21.6 (14.0–27.0) |
| Age (years) at inclusion* | 28.3 (17.0–41.0) | 27.7 (17.0–41.0) | 30.7 (19.0–41.0) | 29.0 (19.0–38.0) |
| Disease duration (years)* | 6.7±5.2 (0.5–24.0) | 6.6±4.8 (0.5–20.0) | 7.0±6.2 (0.5–23.0) | 7.6±9.2 (2.0–24.0) |
| No. of previous pregnancies | 296 | 228 | 62 | 6 |
| No. of previous completed pregnancies (%) | 175 (59.1%) | 122 (53.5%) | 49 (79%) | 4 (66.6%) |
| No. of previous spontaneous abortions (%) | 66 (22.3%) | 53 (23.2%) | 11 (17.7%) | 2 (33.3%) |
| No. of previous elective abortions (%) | 55 (18.6%) | 53 (23.2%) | 2 (3.2%) | 0 (0%) |
| No. of smokers† | 31 | 29 | 2 | 0 |
| 15.2% (10.3% to 20.1%) | 18.7% (12.6% to 54.8%) | 4.5% (0.0% to 10.6%) | (0.0% to 0.0%) | |
| No. of alcohol drinkers† | 4 | 2 | 2 | 0 |
| 1.9% (0.0% to 3.8%) | 1.3% (0.0% to 3.1%) | 4.5% (0.0% to 10.6%) | (0.0% to 0.0%) |