Table 5.
Quality of the embryos selected for single embryo transfer
| Day 3 transfer | T (n = 157) | nT (n = 38) | P-value | |||
| High-quality | ≥7c F ≤10 % | 114 | 72,6 % | 23 | 60,5 % | 0,167 |
| Good-quality | ≥7c F >10- ≤ 50 % or 6c F ≤20 % | 42 | 26,8 % | 12 | 31,6 % | 0,550 |
| Poor-quality | ≥7c F >50 % or 6c F >20 % or <6c | 1 | 0,6 % | 3 | 7,9 % | 0,024 |
| Day 5 transfer | T (n = 111) | nT (n = 24) | ||||
| High-quality | At least full BL, ICM grade A, TE grade A or B | 78 | 70,3 % | 17 | 70,8 % | 1,000 |
| Good-quality | Early BL or BL with ICM grade B, TE grade A or B | 25 | 22,5 % | 5 | 20,8 % | 1,000 |
| Poor-quality | Compacted embryos or BL with ICM and/or TE grade C | 8 | 7,2 % | 2 | 8,4 % | 1,000 |
T tetrahedral, nT non-tetrahedral, n number, c cell stage, F fragmentation, BL blastocyst, ICM inner cell mass, TE trophectoderm
Blastocyst scoring according to Gardner and Schoolcraft (1999). Statistics: two-tailed Fisher’s exact test