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In this study we evaluated cloning efficiency of second-generation (G2) cloned Holstein cows derived from ear fibroblasts of a first-generation (G1) cloned cow, and assessed their health status in terms of physical, growth and reproductive parameters. Compared with G1 cloning, G2 cloning showed a slight decrease on blastocyst rate of reconstructed embryos (30.2±5.8% vs. 28.5±7.2%, p>0.05), while...
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