Table 4 Morphological characteristics of the embryos on day 2 cultured in a sequential medium (group A) versus a single medium (group B) (Chi-square test)
From: Early embryo development in a sequential versus single medium: a randomized study
Characteristics day 2 | GROUP A (n = 419) | GROUP B (n = 583) | p-value |
|---|---|---|---|
Number of blastomeres | Â | Â | Â |
1 | 30 (7%) | 24 (4%) | 0.0353 |
2 | 119 (28%) | 100 (17%) | < 0.0001 |
3 | 61 (15%) | 102 (17%) | NS |
4 | 164 (39%) | 247 (42%) | NS |
≥ 5 | 45 (11%) | 110 (19%) | 0.0004 |
Degree of fragmentation | Â | Â | Â |
0 | 84 (20%) | 140 (24%) | NS |
1 | 91 (22%) | 154 (26%) | NS |
2 | 132 (32%) | 158 (27%) | NS |
3 | 90 (21%) | 115 (20%) | NS |
4 | 22 (5%) | 16 (3%) | 0.0405 |
Size of blastomeres (equal) | 270 (64%) | 294 (50%) | < 0.0001 |
Position of fragments (local) | 237 (70%) | 329 (74%) | NS |
Size of fragments (small) | 235 (69%) | 326 (73%) | NS |
Multinucleation (present) | 22(6%) | 42 (7%) | NS |
Cleavage axes (normal) | 125 (76%) | 186 (75%) | NS |