OXT and schizophrenia: Individuals with obsessive compulsive disorder (OCD), ASDs, eating disorders, addiction, schizophrenia, and posttraumatic stress disorder (PTSD) show dysregulation of OXT levels (Leckman et al., 1994; Frasch et al., 1995; Marazziti and Cassano, 2003; Marroni et al., 2007; Meinlschmidt and Heim, 2008; Ishak et al., 2011).