A milkman is very upset one morning as his cow refuses to give any milk.

Oxytocin hormone is the hormone which stimulates the release of milk from the mammary gland by causing surrounding cells to contract. When the infant starts feeding

breast stimulates the posterior pituitary to produce the oxytocin hormone and oxytocin hormone stimulates the milk secretion. It also contracts the smooth muscles of the

uterus to expel the foetus outside the body of the mother.