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Prolactin |
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prolactin /pro·lac·tin/ (-lak´tin) a hormone of the anterior pituitary that stimulates and sustains lactation in postpartum mammals, and shows luteotropic activity in certain mammals.
Prolactin A hormone that helps the breast prepare for milk production during pregnancy. Mentioned in: Pituitary Dwarfism prolactin, n See hormone, lactogenic. prolactin a hormone secreted by the anterior pituitary that promotes the growth of mammary tissue and stimulates and sustains milk production in postpartum mammals, and shows luteotropic activity in certain mammals. Promotes the secretion of milk in the crop of pigeons and doves. Called also lactogenic hormone, luteotropic hormone, LTH and mammotropin. It is identical with luteotropin. prolactin inhibitory factor (PIF) probably the catecholamine dopamine, released in the hypothalamus, carried to the anterior pituitary via the hypophyseal portal system, and inhibits the secretion of prolactin. prolactin releasing factor (PRF) appears to be released from the hypothalamus in a pulsatile fashion and it is the fluctuation in PRF that regulates the circulating level of prolactin. |
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