Table 2.
Cleavage parameters of embryos by morphologic stage on Day 4 of culture in 5% and 20% O2.
| Cleavage parameter | 5% O2 | 20% O2 | P-value (two-way ANOVA) | |||
|---|---|---|---|---|---|---|
| Expanded blast (n = 161) | Other morphologic stage (n = 16) | Expanded blast (n = 93) | Other morphologic stage (n = 30) | 5% vs. 20% O2 | Expanded blast vs. other stage | |
| C1 (mean hours) | 0.09 | 0.18 | 0.17 | 0.21 | 0.097 | 0.040 |
| P2 (mean hours) | 20.65 | 22.81 | 21.1 | 23.7 | 0.058 | <0.0001 |
| P3 (mean hours) | 0.79 | 1.99 | 1.08 | 1.60 | 0.809 | <0.0001 |
| P4 (mean hours) | 10.12 | 11.38 | 11.26 | 12.32 | 0.033 | 0.017 |