Mifepristone, single dose levonorgestrel, and 2 doses of levonorgestrel for emergency contraception at 6 weeks‡
| Drug | Pregnancy rate | Comparison | Relative risk (95% CI) |
|---|---|---|---|
| ‡All values are not significant. | |||
| Mifepristone | 1.55% | v 2 dose levonorgestrel | 0.87 (0.49 to 1.56) |
| Single dose levonorgestrel | 1.47% | v 2 dose levonorgestrel | 0.83 (0.46 to 1.50) |
| v mifeprisone | 0.95 (0.52 to 1.75) | ||
| 2 dose levonorgestrel | 1.77% | v mifepristone | 1.15 (0.64 to 2.05) |
| Levonorgestrel 2 regimens combined | 1.62% | v mifepristone | 1.05 (0.63 to 1.76) |