Sex differences in behavior, sex hormones, and new cell additions to sexually dimorphic brain regions.

The article reports on a study which uses cell birth-date marker bromodeoxyuridine (BrdU) to label new cells in male and female rats at prepuberty, early puberty, and mid-puberty. The study found that in the anteroventral periventricular nucleus of the hypothalamus, there were increased BrdU immunoreactive cells in females compared to males. Conversely, there were increased BrdU immunoreactive cells in males compared to females in sexually dimorphic nucleus of preoptic area and medial amygdale.