Fig. 4. Linear regression (P<0.01) of the number of mitotic cells and the total cell number in the epiblast of both NT and control embryos. Forty-one percent (19/47) of the NT embryos are outliers (black diamonds), with either too high or too low a number of mitotic cells. By contrast, only 10% of the controls (3/29) are outliers (open triangles). The coefficients of determination R² were statistically significant (P<0.01).