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(A) The mean number of total retrieved oocytes (group I: ≤30 years old, II: 31-35 years, III: 36-40 years, IV: ≥41 years) (I-IV: p=0.001, II-IV: p=0.000, III-IV: p=0.048, ANOVA test with Scheffe's post-hoc test). (B) The mean number of immature oocytes (I-III: p=0.044, I-IV: p=0.008, II-IV: p=0.045). (C) The mean percentage of immature oocytes (II-IV: p=0.049, III-IV: p=0.002).
