Table 2 Comparison of live birth rate in segmented and non-segmented IVF cycles within 3221 women undergoing 8618 cycles of IVF, who had both segmented and non-segmented cycles
|  | Cycles (% cycles) | Live births* (live birth rate) | Rate ratio (95% CI) | Rate ratio, adjusted†(95% CI) |
|---|---|---|---|---|
All cycles | ||||
 Segmented | 3361 (39.0%) | 556 (16.5%) | 0.70 (0.63, 0.76) |  |
 Non-segmented | 5357 (61.0%) | 1250 (23.8%) | 1 |  |
First cycle | ||||
 Segmented | 1720 (53.4%) | 125 (7.3%) | 0.81 (0.64, 1.02) |  |
 Non-segmented | 1501 (46.6%) | 135 (9.0%) | 1 |  |
Second cycle | ||||
 Segmented | 1150 (35.7%) | 313 (27.2%) | 0.85 (0.76, 0.95) | 0.68 (0.50, 0.92) |
 Non-segmented | 2071 (64.3%) | 666 (32.2%) | 1 | 1 |
Third cycle | ||||
 Segmented | 340 (25.5%) | 83 (24.4%) | 0.83 (0.67, 1.02) | 0.78 (0.59, 1.03) |
 Non-segmented | 994 (74.5%) | 294 (29.6%) | 1 | 1 |