A neuropeptide; increases activity of slow-firing oxytocin neurons and triggers the milk ejection reflex in female rats at 1 ng in the third ventricle; induces uterine contraction in female rats and prevents penile erection and yawning in male rats; decreases blood glucose, glucose intolerance, and hyperinsulinemia without affecting body weight in mice with high-fat diet-induced type 2 diabetes,