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RV suppresses the increasing perivitaline space (PVS) in aged porcine oocytes (a) The representative images of perivitaline space in aged porcine oocytes with visible space indicated by white arrows under the microscope, scale bar = 180 µm. (b) The graph indicates the percent increase in perivitaline space after the oocytes treated with 2 µmol/L RV. Significant difference (* p < 0.05).
