| Variable | Mean ± SD | Rang (min-max) |
| Age | 33.4 ± 7.9 | (20 - 65) |
| Gestational age | 26.9 ± 8.8 | (5 - 41) |
| Variable | Median | Quartile (25, 75) |
| Gravidity | 3 | (2, 5) |
| Parity | 2 | (1, 4) |