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The proportion of top, good, and fair quality blastocysts vitrified in the overall blastocyst number (N) per each group.
| Blastocyst quality | Group A (1-2 Blastos frozen) N = 92 | Group B (3-4 Blastos frozen) N = 164 | Group C (5-6 Blastos frozen) N = 262 | Group D (≥7 Blastos frozen) N = 952 |
|---|---|---|---|---|
| Top | 63% (58/92) | 67.1% (110/164) | 80.9% (212/262) | 83.4% (794/952) |
| Good | 17.4% (16/92) | 19.5% (32/164) | 12.2% (32/262) | 12.6% (120/952) |
| Fair | 19.6% (18/92) | 13.4% (22/164) | 6.9% (18/262) | 4% (38/952) |
