Levels of BDNF propeptide in dentate and CA1 regions of untreated animals at PN4 (A) and PN15 (B), as determined byWestern immunoblotting. No sex differences were noted among hippocampal subregions at PN4 (ANOVA, p=0.9091) or PN15 (ANOVA, p=0.5086). Regional differences in BDNF propeptide content were also not indicated at either PN4 (ANOVA, p=0.9689) or PN15 (ANOVA, p=0.0551).