“…On the other hand, relative to brain size or intracranial volume, some studies find no significance sex difference in hippocampal volume (87,292,443,504). These equivocal results may, in part, stem from a failure to consider sexual dimorphisms within certain subregions of the hippocampus (484), or, and perhaps more likely, a failure to control for age, exercise, body mass index, and education as these all influence hippocampal volume (160,209,361,456,515,517,604). It should also be recognized that methodological differences among studies may contribute to differences in findings (322).…”