We wanted to do this by: (a) focusing on whether- in the context of maternal IPV-PTSD- maternal NR3C1 promoter region methylation would correlate with child methylation, and (b) investigating whether maternal NR3C1 promoter region methylation during an early sensitive, developmental period for emotion regulation in children would predict child internalizing and externalizing problems at school-age using prospective longitudinal data. This evidence concerns the gene NR3C1 and post-traumatic stress disorder.