<Tr> <Td> Oxytocin </Td> <Td> </Td> <Td> OT </Td> <Td> Uterus, mammary glands </Td> <Td> Uterine contractions; lactation </Td> <Td> supraoptic and paraventricular nuclei </Td> </Tr> <Tr> <Td> Vasopressin </Td> <Td> Antidiuretic hormone </Td> <Td> VP, AVP, ADH </Td> <Td> Kidneys and arterioles </Td> <Td> Stimulates water retention; raises blood pressure by contracting arterioles </Td> <Td> supraoptic and paraventricular nuclei </Td> </Tr> <P> Insufficient secretion of vasopressin underlies diabetes insipidus, a condition in which the body loses the capacity to concentrate urine . Affected individuals excrete as much as 20 liters of dilute urine per day . Oversecretion of vasopressin causes the syndrome of inappropriate antidiuretic hormone (SIADH). </P>

When is adh released from the posterior pituitary gland