Figure 2. Cross tabulation of embryo scores. This table shows the first morphological scoring of the 99 blastocysts included in the study from the two observers. Scoring was done using the Gardner Schoolcraft's criteria (Gardner et al., 2000). In 55 cases, the embryo received the same score from the two embryologists (green cells). This corresponds to a kappa value of 0.448. In 37 cases, the embryos were scored differently by the two embryologists, but with no effect on the fate of the embryo, i.e. transfer/cryopreservation or discard (yellow cells). In six cases, the two embryologists scored the embryos differently, and the different score would have resulted in a clinically relevant change of fate for the embryo, i.e. the embryo would have been discarded by one embryologist and kept for usage by the other (red cells).