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BACKGROUND: maturation (IVM) was more successful before or after vitrification of these oocytes. MATERIALS AND METHODS: matured without vitrification. In all three groups, we assessed survival rate after warming, maturation rate, and MII-spindle/chromosome configurations. The chi-square test was used to compare rates between the three groups. Statistical significance was defined at P<0.05 and we used Bonferroni criterion to assess statistical significance regarding the various pairs of groups. The Statistical Package for the Social Sciences version 17.0 was used to perform statistical analysis. RESULTS: matured oocytes which were not subjected to vitrification (fresh oocytes, 77.9%). CONCLUSION: matured MII oocytes rather than GV oocytes seems to be more efficient. This approach needs to be verified in nonstimulated fertility preservation cases.
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Kasapi et al. (2017) studied this question.