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Definition of Lactogen
1. Noun. Any agent that enhances milk production.
Medical Definition of Lactogen
1. An agent that stimulates milk production or secretion. Origin: Lacto-+ G. -gen, producing Human placental lactogen (HPL), lactogen isolated from human placentas and structurally similar to somatotropin; its biological activity weakly mimics that of somatotropin and prolactin; secreted into maternal circulation; a deficiency of HPL during pregnancy leads to children having abnormal intrauterine and postnatal growth. Synonym: choriomammotropin, chorionic "growth hormone-prolactin", human chorionic somatomammotropic hormone, human chorionic somatomammotropin, placenta protein, placental growth hormone, purified placental protein. (05 Mar 2000)