CC). Kurtosis was used for normality. For non-parametric continuous data: Wilcoxon rank-sum was used. For categorical data points chi-square test was used. Data was shown as median with interquartile range [IQR] as appropriate. P<0.05 was considered statistically significant.RESULTS: From 1460 blastocyst biopsies, 68% were day 5 blastocysts (N¼986), while 32% were day 6 blastocysts (N¼474).Day 5 blastocysts contained higher amounts of mtDNA compared to day 6 blastocysts.
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