Table 4 Current use of cerclage and minimum prolongation of pregnancy required to introduce prophylactic cerclage into practice
| Â | Current use of cerclage | |
|---|---|---|
Prolongation of pregnancy required to change practice | Use cerclage (n = 308) | Do not use cerclage (n = 174) |
1 week | 44 (14.3%) | 15 (8.6%) |
2 weeks | 86 (27.9%) | 36 (20.7%) |
3 weeks | 178 (57.8%) | 123 (70.7%) |