Quartiles of all male and female covariance and correlation trajectories are show to indicate general sex specific characteristics in the subsequent plot. Since there are 351 pairwise covariance/correlation values, a plot of all of their trajectories together would not be particularly informative. The linear order of the covariances is remarkably stable over age; the correlation of the covariances between different ages was greater than .9 over all pairs of ages. Since the female correlations are stable over the age range, the increase in female covariance driven only by an increase in variance, which in females is proportional to the mean.
