arginine vasopressin (AVP ).
The paraventricular nuclei produce mostly oxytocin and the supraoptic mostly vasopressin although both hormones may also be produced by the other type of nuclei.
A particular gene that produces a protein called vasopressin in their brains contributes to these behaviors.
vasopressin receptor gene regulates social behaviors in many species.
vasopressin levels correlate positively with intensity of nausea.