Table 3 Subgroup analysis of the effect of atosiban on live birth rate
| Â | Atosiban | Placebo | P-value |
|---|---|---|---|
No. of embryos previously transferred | |||
 4 | 43.8% (21/48) | 35.2% (19/54) | 0.377 |
 5 | 53.3% (8/15) | 35.0% (7/20) | 0.278 |
 6 | 50.0% (8/16) | 33.3% (4/12) | 0.378 |
 ≥ 7 | 22.2% (4/18) | 36.4% (4/11) | 0.408 |
No. of previous failed embryo transfers | Â | Â | Â |
 3 | 44.4% (20/45) | 37.3% (19/51) | 0.474 |
 4 | 51.5% (17/33) | 33.3% (10/30) | 0.145 |
 5 | 30.8% (4/13) | 41.7% (5/12) | 0.571 |
 ≥ 6 | 0 (0/6) | 0 (0/4) |  |
Frequency of endometrial peristalsis (waves/min) | |||
 < 3 | 46.0% (40/87) | 35.6% (32/90) | 0.158 |
 ≥ 3 | 10.0% (1/10) | 28.6% (2/7) | 0.323 |
Estradiol on hCG day (pg/ml) | |||
 < 1906 | 38.8% (19/49) | 23.4% (11/47) | 0.104 |
 ≥ 1906 | 45.8% (22/48) | 46.0% (23/50) | 0.987 |