PATHOLOGY

Detailed explanation-1: -Prolactin contributes to hundreds of physiologic functions, but the two primary responsibilities are milk production and the development of mammary glands within breast tissues. Prolactin promotes the growth of mammary alveoli, which are the components of the mammary gland, where the actual production of milk occurs.

Detailed explanation-2: -Progesterone is responsible for the extensive side-branching and alveologenesis required to create a lactation-competent gland. In combination with prolactin, it also promotes the differentiation of specialized structures, alveoli, which synthesize and secrete milk during lactation.