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Physiol Behav. 2010 Dec 2;101(5):679-84. doi: 10.1016/j.physbeh.2010.08.008. Epub 2010 Aug 17.

Oxytocin, cortisol, and triadic family interactions.

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Department of Psychology, Bar-Ilan University, Ramat-Gan, Israel.


The neuropeptide oxytocin (OT) supports the development of parenting in mammals primarily through its impact on parent-infant proximity and touch behaviors; however, much less is known about the links between OT and parental touch and contact in humans. In this study, we examined the relations between maternal and paternal OT and patterns of touch and contact in the family unit during triadic interactions. Thirty-seven parents and their firstborn child were seen twice: during the 2nd and 6th postpartum month. Plasma OT and salivary cortisol (CT) were assessed with ELISA methods. At six months, triadic mother-father-infant interactions were videotaped and micro-coded for patterns of proximity, touch, and gaze behavior. Triadic synchrony, defined as moments of coordination between physical proximity and affectionate touch between the parents as well as between parent and infant while both parent and child are synchronizing their social gaze, was predicted by both maternal and paternal OT. Among mothers, triadic synchrony was also independently related to lower levels of CT. Results highlight the role of OT in the early formation of the family unit at the transition to parenthood.

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