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The effect of different ethylene glycol concentrations, times of exposure and vitrification procedure on viability, cleavage and blastocyst rate of in vitro matured alpaca oocytes chemically activated after vitrification was analyzed. In Experiment 1, oocytes were incubated for 12–15min with different concentrations of ethylene glycol (EG) in the equilibration solution (ES) followed by chemical activation...