prolactoliberin

pro·lac·to·lib·er·in

(prō-lak'tō-lib'ĕr-in)
A substance of hypothalamic origin that stimulates the release of prolactin.
Compare: bioregulator
Synonym(s): prolactin-releasing factor, prolactin-releasing hormone.
[prolactin + L. libero, to free, + -in]