Kalmar "lactogenic hormone" tana nufin wani hormone da ke motsa samar da madara, wanda kuma aka sani da lactation, a cikin dabbobi masu shayarwa. Wannan hormone kuma ana kiransa da prolactin, kuma an samar da shi kuma ya ɓoye shi ta glandan pituitary da ke gindin kwakwalwa. Hormones na lactogenic suna taka muhimmiyar rawa a cikin tsarin haihuwa na mata masu shayarwa, saboda suna taimakawa wajen haɓaka samar da madara da tabbatar da rayuwar jariran da aka haifa. Baya ga rawar da yake takawa wajen shayarwa, prolactin kuma yana da wasu ayyuka da yawa a cikin jiki, gami da daidaita halayen haihuwa, tsarin garkuwar jiki, da metabolism.