Certified Breastfeeding Counselor (CBC) Practice

Prolactin's primary job is to promote and enhance milk production in the mammary glands of the breast. It is a hormone produced by the pituitary gland in response to breastfeeding or nipple stimulation. Prolactin helps the mammary glands grow and develop, stimulating the production of milk in preparation for breastfeeding. Therefore, option B, "Milk production," is the correct answer.