Figure 8. Evaluation of optimal cut-off score and the diagnostic ability of test by ROC analysis.

(a) Data of confirmed competent embryos are plotted in function of data from implantation failure. (b) Data from presumed competent embryos (giving the lowest PI+ EV values among embryos from the same mother) are plotted against data from implantation failure. (c) Data from presumed competent embryos are plotted against data from presumed incompetent embryos in the clinical pregnancy group, plus data from the implantation failure group.