Final answer:
Prolactin (PRL) targets the mammary glands and stimulates the production of milk. It is regulated by hypothalamic hormones PRH and PIH.
Step-by-step explanation:
Prolactin (PRL) targets the mammary glands in females. It stimulates the production of milk by the mammary glands and contributes to the establishment and maintenance of breast milk supply. Prolactin levels are regulated by the hypothalamic hormones prolactin-releasing hormone (PRH) and prolactin-inhibiting hormone (PIH).