Table 1. Effect of different durations of 100 μM VitC treatment on the in vitro development and quality of cloned mouse embryos.
No. activated embryos developed to (%) | Mean cell number (±SEM) 96 h p.a. | ||||||||
---|---|---|---|---|---|---|---|---|---|
Group | No. reconstructed | No. activated (%) | Two cell | Morula | Blastocyst | No. blastocysts | ICM | TE | Total |
NT | 186 | 176 (94.6) a | 143 (81.3) a , b | 111 (63.1) a , b | 47 (26.7) a | 46 | 10.7±0.7 a | 24.9±1.5 a | 35.6±2.1 a |
VitC 8–9 h | 206 | 200 (97.1) a | 159 (79.5) a | 112 (56.0) a | 71 (35.5) a , b | 39 | 12.8±0.9 a , b | 26.2±1.7 a , b | 39.0±2.4 a , b |
VitC 16 h | 219 | 209 (95.4) a | 188 (90.0) c | 152 (72.7) b , c | 89 (42.6) b , c | 45 | 15.0±0.7 b | 31.5±1.3 a , b | 46.4±1.8 b |
VitC 24 h | 218 | 208 (95.4) a | 184 (88.5) b , c | 149 (71.6) b , c | 92 (44.2) b , c | 43 | 14.3±0.7 b | 31.4±1.5 a , b | 45.7±2.1 a , b |
VitC 120 h | 214 | 207 (96.7) a | 186 (89.9) c | 159 (76.8) c | 95 (45.9) c | 47 | 15.3±0.8 b | 32.8±1.5 b | 43.1±2.1 b |
NT: non-treated cloned embryos; p.a.: post-activation
a-c Values with different superscripts differ significantly within the same column (p < 0.05; Chi-square test for embryonic development and Kruskall-Wallis for blastocysts cell numbers).