Prolactin is a hormone produced through your pituitary gland which sits at the bottom of the mind. Prolactin causes breasts to grow and broaden and causes milk to be made after an infant is born. commonly, both women and men have small amounts of prolactin in their blood. Prolactin, also referred to as luteotropic hormone or luteotropin, is a protein best acknowledged for its function in enabling mammals, normally females, to supply milk. it's miles influential in over three hundred separate tactics in diverse vertebrates, such as humans. One of the most regulators of the assembly of prolactin from the pituitary is that the hormone called dopamine, which is produced by the hypothalamus, the a part of the brain directly above the pituitary . Dopamine restrains prolactin production, therefore the more dopamine there's , the less prolactin is released. Prolactin itself enhances the secretion of dopamine, so this creates a feedback loop.