The endocrinology of lactating women consists in increased amounts of prolactin and oxytocin, needed for milk production and release respectively. Very little is known on the relationship between these hormones and the appetite-modulating gut peptides. Intravenous ghrelin activates the hypothalamic-hypophysis-adrenal axis in humans and also increases prolactin release in healthy humans (Aimaretti et al). Intraventricular ghrelin administration increases intrahypothalamic oxytocin production in rats (Olszewski et al).