The posterior pituitary gland secretes two important hormones. These hormones are formed in the hypothalamus but secreted through the posterior pituitary gland:

1.Antidiuretic hormone (ADH) - This hormone, also known as vasopressin, stimulates the reabsorption of water by the kidney tubules. In addition, ADH can also increase blood pressure by constricting arterioles.

2. Oxytocin - This hormone stimulates the uterus to contract during childbirth and maintains labor during childbirth. Oxytocin is also secreted during suckling and causes the production of milk from the mammary glands.