Sex differences in gray matter volume: how many and how large are they really ?

ConclusionsThere is not just one answer to the question of how many and how large the sex differences in GMv are, but not all the possible answers are equally valid. When TIV effects are ruled out using appropriate adjustment methods, few sex differences (if any) remain statistically significant, and their size is quite reduced.
Source: Biology of Sex Differences - Category: Biology Source Type: research