Fig. 10
Prostaglandin F2α concentrations in the culture medium of day 2, day 5 and day 7 bovine early- and late-cleaved embryos. The levels of PGF2α are presented as ng/ml per viable embryo 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 (black 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