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In developing nations , oxytocin is not practical because it must be kept refrigerated and administered by trained medical professionals . The neuropeptides oxytocin and vasopressin appear to be essential for linking social signals to the mesocorticolimbic dopamine circuit . " When the hormone oxytocin is released as part of the stress responses in a woman , it buffers the fight or flight response and encourages her to tend children and gather with other women instead . David Turner : The four genes coding for 2 estrogen receptors , oxytocin , and the oxytocin receptor act to link hypothalamic and limbic forebrain neurons ; estrogen acts on the OT system at two levels : through ER-b , they regulate the production of OT in the hypothalamic PVN , and through ER-a , they drive the transcription of the OT receptor in the amygdala .