Euploidy rate according to previous failed IVF cycles. (A) Mean euploidy rate per cohort of biopsied blastocysts from each patient according to the number of previous failed IVF cycles (no/1/2/>2) and among different ranges of maternal age at oocyte retrieval. (B) Linear regressions reporting the data in the control (no previous failed IVF cycle) and the mean difference in patients with 1, 2 or >2 previous failed IVF cycle(s).