BRD2 and Infertility: However, the difference in euploidy rates between the day 5 (48/125) and day 6 (62/215) blastocysts was not statistically significant (38.40% vs. 28.84%; OR = 1.135, 95% CI 0.677–1.903; P = 0.630) 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.