Explore the pathophysiology of prolactin, hyperprolactinemia, dopamine, and TRH in this comprehensive endocrine physiology video. Delve into the structure and function of prolactin, its relationship with other hormones like estrogen and human lactogen, and the role of dopamine in regulating prolactin secretion. Learn about the causes and consequences of hyperprolactinemia, the JAK-STAT signaling pathway, and the intricate connections between the hypothalamus and pituitary gland. Gain valuable insights into the master control of hormones and their impact on various physiological processes, including lactation and kidney function.