| Parameters | Rate (n = 71) | Percentage |
| Clinical signs |
|
|
| Pelvic pain | 71 | 100 |
| Hydrorrhea | 27 | 38.6 |
| Genital hemorrhagia | 17 | 24.3 |
| Proof of threat of preterm birth |
|
|
| <3 | 12 | 16.9 |
| Between 3 and 6 | 20 | 28.1 |
| >6 | 39 | 55 |