“…Along these lines, the ART calculator -a clinical predictive model used to estimate the number of mature (metaphase II) oocytes needed to obtain at least one euploid embryo in couples undergoing ARTindicates that 13 (95% confidence interval [CI]: 11-16), 16 (95% CI: [13][14][15][16][17][18][19][20], and 19 (95% CI: 15-25) oocytes are needed for women aged 38, 39, and 40 years, respectively [10,11]. By contrast, only 5 (95% CI: 4-6) and 6 (95% CI: 5-7) oocytes are required for patients aged 33 and 34 years to have at least one euploid embryo [10,11]. These figures, combined with the proven reduced ovarian reserve in patients of advanced age, clearly indicate that reproductive outcomes will be decreased if treatment is further delayed.…”