| Variables | Categories | Complications N = 37 n (%) | No Complications N = 29 n (%) | OR (95% CI) | P |
| Number of prenatal consultations | ≤4 | 17 (45.9) | 1 (3.4) | 5.76 (12.20 - 27.24) | 0.02 |
| 5 - 7 | 17 (45.9) | 4 (13.8) | 0.81 (0.03 - 2.03) | 0.90 | |
| ≥8 | 3 (8.2) | 24 (82.8) | 0.38 (0.12 - 1.22) | 0.101 | |
| Ultrasound scans done | T1 | 4 (10.8) | 0 (0.0) | - | - |
| T2 | 3 (8.1) | 2 (6.9) | 1.77 (0.76 - 3.40) | 0.207 | |
| T3 | 1 (2.7) | 0 (0.0) | 0.49 (0.05 - 4.50) | 1 | |
| T1, T2, T3 | 12 (32.4) | 17 (58.6) | 1.37 (0.12 - 2.23) | 0.96 | |
| T1 and T2 | 2 (5.4) | 1 (3.4) | 1.67 (0.05 - 4.50) | 0.96 | |
| T2 and T3 | 9 (24.3) | 7 (24.1) | 1.31 (0.63 - 2.98) | 0.98 | |
| None | 6 (16.2) | 2 (6.9) | 2.65 (1.08 - 4.65) | 0.04 |