| Table 3. Number of cells at D-2 and D-3 for embryos cultured in single medium or sequential media | |||
| No. cells | No. embryos Single medium (%) | No. embryos Sequential media (%) | p |
| D+2 | n=486 | n=472 | |
| <4 | 72 (15) | 138 (29) | <0.001 |
| 4 | 279 (57) | 205 (43) | <0.001 |
| 5 | 78 (16) | 64 (14) | NS |
| 6 | 29 (6) | 23 (5) | NS |
| >6 | 16 (3) | 17 (4) | NS |
| Discarded* | 25 (5) | 12 (4) | NS |
| D+3 | n=141 | n=145 | |
| <7 | 29 (20) | 53 (37) | 0.099 |
| 7-8 | 86 (61) | 52 (36) | 0.046 |
| 9-10 | 16 (11) | 17 (12) | NS |
| >10 | 5 (4) | 10 (7) | NS |
| Discarded* | 5 (4) | 13 (8) | NS |
| * Embryos blocked or of very bad quality. No: number. NS: not significant. | |||