IVF and control infants
| IVF | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Singleton (n=150) | Multiple births (n=128) | Total (n=278) | Controls (n=278) | ||||||
| Gestational age (weeks) | |||||||||
| Mean (SD) | 38.411-152 | (2.51) | 35.24 | (3.06) | 36.95 | (3.19) | 39.451-161 | (1.25) | |
| ≥37 | 127 | (84.7%) | 54 | (42.2%) | 181 | (67.3%) | 278 | (100%) | |
| 32-36 | 19 | (12.7%) | 57 | (44.5%) | 76 | (27.3%) | 0 | (0.0%) | |
| <32 | 4 | (2.7%) | 17 | (13.3%) | 21 | (7.6%) | 0 | (0.0%) | |
| Birth weight (g) | |||||||||
| Mean (SD) | 3016.31-152 | (641.6) | 2078.6 | (612.7) | 2584.5 | (783.2) | 3379.81-152 | (428.3) | |
| <2500 | 22 | (14.7%) | 98 | (76.6%) | 120 | (43.2%) | 2 | (0.7%) | |
| <1500 | 5 | (3.3%) | 25 | (19.5%) | 30 | (10.8%) | 0 | (0.0%) | |
| <1000 | 1 | (0.7%) | 2 | (1.6%) | 3 | (1.1%) | 0 | (0.0%) | |
| Mode of delivery | |||||||||
| Vaginal | 1101-152 | (73.3%) | 57 | (44.5%) | 167 | (60.1%) | 2591-161 | (93.2%) | |
| Caesarean section | 40 | (26.7%) | 71 | (55.5%) | 111 | (39.9%) | 19 | (6.8%) | |
| Boys | 80 | (53.3%) | 61 | (47.7%) | 141 | (50.7%) | 141 | (50.7%) | |
| Girls | 70 | (46.7%) | 67 | (52.3%) | 137 | (49.3%) | 137 | (49.3%) | |
| Sex ratio (M:F) | 1.14 | 0.91 | 1.03 | 1.03 | |||||
| Social class | |||||||||
| 1 | 0 | (0.0%) | 3 | (2.3%) | 3 | (1.1%) | 3 | (1.1%) | |
| 2 | 8 | (5.3%) | 10 | (7.8%) | 18 | (6.5%) | 18 | (6.5%) | |
| 3 | 118 | (78.7%) | 94 | (73.4%) | 212 | (76.3%) | 212 | (76.3%) | |
| 4 | 24 | (16.0%) | 24 | (16.4%) | 45 | (16.2%) | 45 | (16.2%) | |