“(…) neurohypophyseal peptides oxytocin and vasopressin in the central mediation of complex social behaviours, including affiliation, parental care and territorial aggression. Research on a monogamous rodent, the prairie vole (Microtus ochrogaster) suggests that these neuropeptides also involved in the control of several behaviours associated with monogamy, including pair bonding, paternal care and mate guarding”.