Parameters | OCP | E2 | Risk difference (%) (95% CI) | P value |
---|---|---|---|---|
 | (n = 50) | (n = 50) |  |  |
Implantation rate a | 43.5% (30/69) | 47.4% (27/57) | 3.9 | 0.79 |
(-13.4 to 21.1) | ||||
Pregnancy rate per cycle | 56.0% (28/50) | 52.0% (26/50) | -4.0 | 0.84 |
(-23.1 to 15.4) | ||||
Clinical pregnancy rate per cycle | 50.0% (25/50) | 48.0% (24/50) | -2.0 | 0.99 |
(-21.3 to 17.4) | ||||
Early clinical miscarriage b rate per pregnancy | 7.1% (2/28) | 7.7% (2/26) | 0.6 | 0.66 |
(-16.4 to 18.3) | ||||
Ongoing pregnancy rate per cycle | 46.0% (23/50) | 44.0% (22/50) | -2.0 | 0.99 |
(-21.2 to 17.3) | ||||
Live birth rate per cycle | 42.0% (21/50) | 40.0% (20/50) | -2.0 | 0.99 |
 |  |  | (-21.0 to 17.1) |  |