| Table 1. Clinical characteristics of patients with at least one expanded blastocyst transferred (* Grade 1 and 2a). | |
| Age | 34,8 ± 3,4 |
| Basal FSH | 6,4 ±1,2 |
| Follicles | 17,8 ±7,1 |
| Oocytes retrieved | 13,7 ±5,8 |
| Zygotes | 7,9 ±2,9 |
| Day 3 Good quality embryos* | 4,4 ±1,9 |