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| Variables | Gestational age (weeks) | ||||||
|---|---|---|---|---|---|---|---|
| 18 | 19 | 20 | 21 | 22 | 23 | 24 | |
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
| Curved cervix | 58 (66.7) | 51 (56.0) | 46 (53.5) | 50 (59.5) | 34 (41.0) | 97 (46.0) | 54 (49.1) |
| Straight cervix | 29 (33.3) | 40 (44.0) | 40 (46.5) | 34 (40.5) | 49 (59.0) | 114 (54.0) | 56 (50.9) |
| Total | 87 | 91 | 86 | 84 | 83 | 211 | 110 |
