What hormone is necessary for the let-down reflex?

Question

Quizplus · Accepted Answer

The let-down reflex is stimulated by oxytocin, which is released from the pituitary gland in response to a baby's sucking. Oxytocin causes the muscles around the milk-producing cells in the breast to contract and push the milk out of the nipple. Prolactin is necessary for milk production, but not for the let-down reflex. Estrogen and progesterone play a role in preparing the breast for lactation, but are not directly involved in the let-down reflex.

What Hormone Is Necessary for the Let-Down Reflex