Figure 5: Rate of aneuploidy and quality of trophectoderm (TE). Aneuploidy rates of embryos with a B grade TE were significantly higher than A grade TE in all but one age groups. Donor egg: p=0.0001; <35: p=0.0007; 35-39: p=0.039; 40-42: p=0.06 (not significant); >42: p=0.00.