| Table 4: Cycle parameters, clinical pregnancies and deliveries in frozen-thawed cycles (n=273) | ||||||
| Parameter | Clinical Pregnancy | P value | Live Birth | P value | ||
| Yes | No | Yes | No | |||
| Fresh cycle protocol type | 0.34* | 0.21* | ||||
| Oocytes retrieved | 15.46 ± 6.4 | 13.81 ± 5.8 | 0.04** | 15.31 ± 6.4 | 14.01 ± 5.9 | 0.16** |
| Oocytes fertilized | 11.33 ± 5.4 | 9.65 ± 4.7 | 0.01** | 11.09 ± 5.3 | 9.88 ± 4.8 | 0.10** |
| Cleaved embryos | 9.45 ± 4.3 | 8.34 ± 3.8 | 0.04** | 9.41 ± 4.4 | 8.46 ± 3.8 | 0.12** |
| Number of embryos frozen in fresh cycle | 6.64 ± 4.4 | 5.31 ± 3.7 | 0.01** | 6.7 ± 4.4 | 5.43 ± 3.8 | 0.03** |
| Number of embryos thawed | 2.67 ± 1.1 | 2.98 ± 1.5 | 0.11** | 2.70 ± 1.1 | 2.94 ± 1.5 | 0.27** |
| Number of embryos transferred after thawing | 2.01 ± 0.7 | 2.11 ± 0.7 | 0.33** | 2.00 ± 0.6 | 2.11 ± 0.8 | 0.36** |
| Assisted hatching performed (%) | 6.6 | 14.7 | 0.07* | 7.4 | 13.7 | 0.21* |
| Mode of endometrial preparation for FET | ||||||
| Spontaneous (n=21) | 6 (7.9%) | 15 (7.7%) | 1.0*** | 5 (9.3%) | 16 (7.4%) | 0.67*** |
| Artificial (n=249) | 70 (92.1%) | 179 (91.8%) | 49 (90.7%) | 200 (92.2%) | ||
| Mean endometrial thickness (cm) | 0.972 | 0.9914 | 0.47** | 0.9881 | 0.9854 | 0.93** |
| Max Estradiol (pmol/l) | 1724.7 | 1427 | 0.15** | 1720.6 | 1458.1 | 0.26** |
| * x2-test **t-test ***Fisher’s exact test | ||||||