PROLACTIN By N., Pam M.S. - April 28, 2013 Prolactin is a hormone secreted by the pituitary gland. It is responsible for milk secretion in the mammary glands. Also known as lactogenic hormone or luteo-tropic hormone. PROLACTIN: "After giving birth, Alicia's prolactin levels increased." Related Psychology Terms NURSING BEHAVIOR ANTERIOR PITUITARY HORMONE GYNECOMASTIA SOMATOSTATIN RELEASING HORMONE OXYTOCIN TROPIC HORMONE (TROPHIC HORMONE) BROMOCRIPTINE GALACTORRHEA GROWTH HORMONE (GH) Cite this page: N., Pam M.S., "PROLACTIN," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/prolactin/ (accessed July 21, 2019).