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Release of vasoactive intestinal polypeptide (VIP) in breast-feeding women
Blood samples were collected in peripheral venous blood of ten postpartum women before, during and after breast-feeding. Vasoactive intestinal polypeptide (VIP) and prolactin (PRL) were measured radioimmunochemically. A parallel significant increase in the VIP and PRL concentrations was observed following breast-feeding. VIP increased from a median control value of 4.5 pmol . 1(-1) to 18 pmol . 1(-1), and PRL increased from 2.8 U . 1(-1) to 5.2 U . 1(-1). A positive but insignificant correlation between corresponding PRL and VIP values was found.
Blood samples were collected in peripheral venous blood of ten postpartum women before, during and after breast-feeding. Vasoactive intestinal polypeptide (VIP) and prolactin (PRL) were measured radioimmunochemically. A parallel significant increase in the VIP and PRL concentrations was observed following breast-feeding. VIP increased from a median control value of 4.5 pmol . 1(-1) to 18 pmol . 1(-1), and PRL increased from 2.8 U . 1(-1) to 5.2 U . 1(-1). A positive but insignificant correlation between corresponding PRL and VIP values was found.