Besides, day 5 blastocysts were associated with higher euploidy rates than day 6 blastocysts (48.49% vs. 34.72%; OR 1.431, 95% CI 1.155–1.772; P= 0.001) after adjusting for blastocyst morphology, maternal age, maternal BMI, duration of infertility, type of infertility, infertility diagnosis, number of prior pregnancies, indication for PGT-A and basal FSH. This evidence concerns the gene BRD2 and Infertility.