an anterior pituitary polypeptide hormone that stimulates lactation by the mammary glands at parturition in mammals, the activity of the crop in birds, and in some mammalian species the production of progesterone by the corpus luteum.
If prolactin levels remained high, milk could follow.
These drugs decrease prolactin levels and shrink the tumor.
After childbirth, prolactin levels fall as the internal stimulus for them is removed.
Human prolactin receptors are insensitive to mouse prolactin.
The serum prolactin level usually rises following an epileptic seizure.
British Dictionary definitions for prolactin
a gonadotrophic hormone secreted by the anterior lobe of the pituitary gland. In mammals it stimulates the secretion of progesterone by the corpus luteum and initiates and maintains lactation Also called luteotrophin, luteotrophic hormone See also follicle-stimulating hormone, luteinizing hormone