| Table 6. Blastocyst formation rate according to the female age group | ||||
| Blastocyst formation rate | ||||
| Maturation stage of oocyte | ≤ 34 years | 35-39 years | ≥ 40 years | p-value* |
| MII | 38.4% | 37.5% | 28.6% | 0.030 |
| Rescued MI-MII | 8.5% | 9.7% | 6.6% | 0.128 |
* Kendall correlation