<unk>  <unk> t or<unk>  is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. It plays a role in social bonding, reproduction, childbirth, and the period after childbirth.<unk>  is released into the bloodstream as a hormone in response to sexual activity and during labour. It is also available in pharmaceutical form. In either form,<unk>  stimulates uterine contractions to speed up the process of childbirth. In its natural form, it also plays a role in bonding with the baby and milk production. Production and secretion of<unk>  is controlled by a positive feedback mechanism, where its initial release stimulates production and release of further<unk> . For example, when<unk>  is released during a contraction of the uterus at the start of childbirth, this stimulates production and release of more<unk>  and an increase in the intensity and frequency of contractions. This process compounds in intensity and frequency and continues until the triggering activity ceases. A similar process takes place during lactation and during sexual activity.<unk>  is derived by enzymatic splitting from the peptide precursor encoded by the human<unk> T gene. The deduced structure of the active nonapeptide is: : Cys – Tyr – Ile – Gln – Asn – Cys – Pro – Leu – Gly – NH2, or CYIQNCPLG-NH2.
Oxytocin
Prolene
Antigonadotropin
Progestogen
Progestogen 
Progonadotropin
Menotropin
Psilocin