Relative optical density of oxytocin receptor (OXTR) in three forebrain regions of interest: nucleus accumbens (NAcc), caudoputamen (CP), and insula (Ins). Males are represented in the top row, Females in the bottom row. Striatal NAcc and CP OXTR density is significantly higher in C/T animals than in T/T, regardless of rearing (Males and Females). In Females, the CP and Ins exhibited a genotype-by-rearing interaction; NAcc exhibited a trend (p = 0.056). Bars represent means ± SEM. * p < 0.05, ** p < 0.01, *** p < 0.001.