Oxytocin is a mammalian hormones, can in the brain under thalamic "paraventricular nuclear" and "nuclear neurons the natural secretion.

For women, it can cause uterine contractions during labor, and stimulate the production of milk (rather than the secretion).

In addition, it can reduce the body's adrenal glands and other stress hormone levels, in order to reduce blood pressure.

It is not a woman's patent, men and women can secrete.