Fig. 7

The transcription profile of PTGFR in bovine early- and late-cleaved embryos at the morula stage. This figure demonstrates the quality grade-dependent changes in mRNA expression in morulas at grades A, B and C within each group. The values are presented as arbitrary units and are expressed as the mean ± SEM. Different small letters indicate statistical significance (P < 0.05) within the early-cleaved group (white bars), different capital letters indicate significant differences (P < 0.05) within the late-cleaved group (grey bars), and asterisks indicate statistical significance (P < 0.05) between the early- and late-cleaved groups, as determined by two-way ANOVA, followed by the Bonferroni’s multiple comparison test