| Group A | Group B | P value |
---|---|---|---|
Total embryos | 901 | 861 | Â |
Embryonic development, D1-D3 | Â | Â | Â |
Syngamy (at 25 hours) | 39% | 34% | 0.0516 |
Early cleavage (at 25 hours) | 9% | 9% | 1.0000 |
Cleavage (D2 at 48 hours) | 98% | 99% | 0.3833 |
Embryos with ≥ 6 cells (D3) | 64% | 66% | 0.4543 |
Compaction | Â | Â | Â |
Embryos compacting (D4) | 25% | 36% | 0.0007 |
Blastulation | Â | Â | Â |
Total embryos in extended culture | 471 | 432 | Â |
Overall blastulation rate | 34% | 38% | 0.3297 |
Overall utilization | Â | Â | Â |
Embryos transferred | 28% | 30% | 0.3865 |
Embryos frozen | 34% | 36% | 0.3401 |