“…Dopamine system stimulation through the use of agonists, particularly D2 receptor agonists, has been shown to promote the release of peripheral oxytocin (Amico et al, 1992(Amico et al, , 1993Crowley et al, 1992;Parker and Crowley, 1992), while administration of dopamine antagonists results in a significant disruption in pup retrieval, nest building, and motor activity in general (Byrnes et al, 2002;Giordano et al, 1990;Keer and Stern, 1999;Silva et al, 2001Silva et al, , 2003Stern and Keer, 1999). As Stern and Keer (1999) suggest, this could potentially be due to the dopamine system involvement in motivation and reward. A 1.5 mg/kg dose of the dopaminergic reuptake inhibitor, amfonelic acid, enhanced maternal behaviors on postpartum day (PPD) 1 and decreased maternal aggression on PPD 6 in gestationally treated rat dams and oxytocin levels were significantly increased in the amygdala of the less aggressive AFA treated dams on PPD 8 (Johns et al, 1995(Johns et al, , 1996.…”