BIOCHEMISTRY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site oxytocin A mammalian and avian hormone that in women is released mainly after stimulation of the nipples or distention of the vagina. Oxytocin facilitates birth through contraction of the smooth muscle of the uterus and breastfeeding through expulsion of milk from the mammary glands during suckling. It is also released during orgasm in both sexes. In the brain, it acts as a neurotransmitter and is involved in bonding and the formation of trust between people. Oxytocin is produced by the neurosecretory cells of the hypothalamus but is stored and secreted by the posterior pituitary gland. Use as a drug Synthetic oxytocin can be used to induce birth. It is also used to help expel the placenta after delivery or to empty the uterus after an incomplete miscarriage. Oxytocin is sometimes given as a nasal spray to stimulate milk flow. Related category    • BIOCHEMISTRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP