The hormone that acts on the mammary glands and stimulates the formation of alveoli and milk secretion is

Progesterone acts on the mammary glands and stimulates the formation of alveoli and milk secretion, during pregnancy.Oestrogens cause the growth of the ductal system. Oxytocin stimulates milk ejection.Vasopressin stimulates the reabsorption of water from latter parts of renal tubules.