<prompt> Stimulus for prolactin release is ?DopamineHyperglycemiaSleepNipple stimulation  <response>: Ans. isdi.e., Nipple stimulationRef: Human physiology p.383Prolactin is the only pituitary hormone which is primarily under inhibitory control of hypothalamus .Its secretion is suppressed by dopamine Prolactin inhibitory substance secreted by hypothalamus. 