The major functions of oxytocin have to do with smooth muscle contraction.
Antidiuretic hormone (ADH) and Oxytocin are both hormones stored and secreted by the posterior pituitary gland. The main functions of Oxytocin are aiding in sexual reproduction. The main function of ADH is retaining fluid in the body.
Dunno what it does in males (if anything). In females, it stimulates lactation, mostly. If given artificially, it can stimulate contraction of the uterus and parturition (doctors use it to induce labor). But it isn't really clear if the pituitary secretes oxytocin on its own to stimulate labor, or if there is some other mechanism that induces labor.
The function of the posterior lobe of the pituitary gland is to store and secrete hormones that are produced by the brain. These hormones are oxytocin and antidiuretic hormone.
The oxytocin in blood stimulates the pituitary to secrete more oxytocin.
The posterior pituitary has neurosecretory tissue. It is activated by impulses from the hypothalamus and release hormones such as oxytocin and ADH.
oxytocin
Oxytocin ejects milk from mamary glads.Muscles of uterus are contracted.
Oxytocin is made in the posterior pituitary. Oxytocin prompts the let-down reflex, and stimulates contraction of the uterus during childbirth.
Oxytocin is a peptide hormone and is removed by enzymatic cleavage in the plasma.
Oxytocin is very similar to vasopressin.
Oxytocin is a neurohormone that is released to stimulate uterine contractions. When labor is induced, Pitocin is given. This is a synthetic form of oxytocin. Additionally, oxytocin stimulates mammary glands for milk let down in breast feeding mothers.