 Dear students, in this topic, we shall discuss the hormones of neurohypophysis, i.e. the hormones of posterior lobe of pituitary. The posterior lobe of pituitary is also called neurohypophysis or pars nervosa. It stores and releases two hormones, the anti-diuretic hormone, ADH, and oxytocin. Both these hormones are peptides containing 9 amino acid residues. The ADH and oxytocin are synthesized and packaged in the cell bodies of two groups of neuro-security cells of interior portion of hypothalamus. Neurosacritic cells are the supra-optic nuclei and para-ventricular nuclei. After their synthesis, these hormones are transported within the axones of hypo-thelmo-hypo-physyl tract, i.e. from the hypothalamus, the nerve tract, which is coming into neuro-hypophysis, is released along with the tract or transported. After transport, they are released by the nerve terminals in the posterior pituitary where they are released into the capillary bed that contains the blood. The anti-diuretic hormone promotes water reabsorption in the kidneys. As a result, it decreases urine volume. By these processes, it helps to regulate the osmolarity of blood. It also acts as a vasoconstrictor, increasing the arterial blood pressure. For this reason, it is named as vasopressor. Now we shall discuss the functions of oxytocin. Oxytocin mammals' most important function of oxytocin is the uterine contraction during childbirth. Apart from this, after childbirth, the ejection of milk from the mammary gland during the nursing process, which comes out of the milk, is also controlled by oxytocin. This is its second most important function. Apart from this, it also has some auxiliary functions, i.e. it functions in the regulation of mood and sexual arousal, both in males and females. Words in which the process of parturation or milk production is not present, oxytocin is also present. There are 8 functions in reproduction in the motility of oviduct.