| Factors | No. of surrogates | No. of pregnancy (Implantation rate) | No. of delivery (delivery rate) |
|---|---|---|---|
| Estrus synchronization program | |||
| Day 0 | 46 | 15 (32.6%) | 3 (20.0%) |
| Day −1 | 34 | 20 (58.8%) | 3 (15.0%) |
| Total | 80 | 35 (43.8%) | 6 (17.1%) |
| Ovulation status | |||
| Pre-ovulation | 68 | 31 (45.6%) | 5 (16.1%) |
| Mid-ovulation | 9 | 3 (33.3%) | 0 (0.0%) |
| Post-ovulation | 3 | 1 (33.3%) | 1 (100.0%) |
| Total | 80 | 35 (43.8%) | 6 (17.1%) |
| Number of surgeries | |||
| First | 37 | 14 (37.8%) | 1 (7.1%) |
| Second | 30 | 13 (43.4%) | 4 (30.8%) |
| Third | 13 | 8 (61.5%) | 1 (12.5%) |
| Total | 80 | 35 (43.8%) | 6 (17.1%) |
| Embryo transfer sites | |||
| Single oviduct | 68 | 25 (36.8%) | 4 (16.0%) |
| Both oviduct | 12 | 10 (83.3%) | 2 (20.0%) |
| Total | 80 | 35 (43.8%) | 6 (17.1%) |