Neuroendocrinology is the branch of physiology which deals with the study of interactions between the endocrine system and the nervous system. It encompasses the way brain regulates the hormonal activity in the body. To regulate the physiological processes of the human body, the endocrine and nervous systems often act together and the process is known as neuroendocrine integration. Neuroendocrine system is a system by which hypothalamus maintains homeostasis by regulating metabolism, energy utilization, eating and drinking behavior, reproduction, blood pressure and osmolarity. G protein-coupled receptors (GPCRs) are the neuropeptide targets via which the intracellular signaling transduction pathways are activated. This book is a valuable compilation of topics, ranging from the basic to the most complex advancements in the field of neuroendocrinology. It is an upcoming field of science that has undergone rapid development over the past few decades. This book is a resource guide for experts as well as students.