Fig. 3.

Changes in mitochondrial oxygen consumption (mtOCR; mean) and maximum mtOCR (mean) during preimplantation development of human embryos. The mtOCR was calculated by subtracting the value obtained in the presence of cyanide from the value obtained without any mitotoxins. The maximum mtOCR was calculated by subtracting the value obtained in the presence of cyanide from the value obtained in the presence of FCCP. The numbers of oocytes or embryos examined are shown in parentheses. Different superscript letters (a–d) indicate significant differences (P < 0.01) by Steel-Dwass following Kruskal-Wallis following ANOVA