prolactin-inhibiting factor

pro·lac·tin-in·hib·it·ing fac·tor (PIF),

dopamine, a substance that inhibits secretion of prolactin by the anterior pituitary gland.

pro·lac·to·stat·in

(prō-lak'tō-stat'in) A substance of hypothalamic origin capable of inhibiting the synthesis and release of prolactin.
Compare: bioregulator
Synonym(s): prolactin-inhibiting factor, prolactin-inhibiting hormone. [prolactin + G. stasis, standing still, + -in]