Recently, impaired OXT function has been implicated in the abnormal social communications seen in certain human psychiatric diseases such as autism and schizophrenia, although a causal role of OXT in specific human behaviors and associated disorders is still to be clearly established (De Berardis et al., 2013; Gordon et al., 2013; Heinrichs and Domes, 2008; Owen et al., 2013; Pobbe et al., 2012). The gene discussed is OXT; the disease is schizophrenia.