Despite availability of reviews on intranasal oxytocin in postpartum depression (Kim et al. 2014; Moura et al. 2016) and parenting behavior (van IJzendoorn and Bakermans-Kranenburg 2016; Szymanska et al. 2017), fundamental observational research is necessary to delineate the nuances of the oxytocinergic system in PTSD-FC. This evidence concerns the gene OXT and post-traumatic stress disorder.