Who plays the strings in newborn analgesia at birth, vasopressin or oxytocin?

For many years, oxytocin has been viewed as the primary hormone edging endocrinology, behavior, and pain in mothers and infants around parturition. Very recent work puts the vasopressin receptor 1A in the focus of peripheral analgesia and pain relief in respect to circulating vasopressin and oxytocin. Here, we present a concise overview on these new findings, will discuss them in context of parturition, and will outline new avenues