Prolactin

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Prolactin is a peptide hormone formed and secreted by the anterior lobe of the pituitary (adenohypophysis). Prolactin stimulates the growth of the mammary gland (ductal system) and the production of breast milk. Prolactin secretion increases significantly during pregnancy and a few months after childbirth (if a woman is breastfeeding), a slight increase in secretion also occurs during physical exertion and psychological stress (in both women and men). Prolactin secretion is inhibited by prolactin-inhibiting hormone (PIH, it is dopamine formed in the hypothalamus).

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