Figure 1: Aneuploidy rates vs. developmental stage. %Aneuploidy rates (Y axis) of embryos according to the day they reached the stage of development ready to biopsy (day 5 or 6). Donor egg: p=0.001 (significantly different); <35: p=>0.05 (not significant); 35-39: p=>0.05 (not significant); 40-42: p=0.04 (significantly different-Mann-Whitney test).