Magnocellular neurons: Antidiuretic hormone (ADH, also known as vasopressin and arginine vasopressin AVP), the majority of which is released from the supraoptic nucleus in the hypothalamus. Oxytocin, most of which is released from the paraventricular nucleus in the hypothalamus. Oxytocin is one of the few hormones to create a positive feedback loop. For example, uterine contractions stimulate the release of oxytocin from the posterior pituitary, which, in turn, increases uterine contractions. This positive feedback loop continues throughout labour.
magnOcellulaR Neurons: antiDiureTiC Hormone (AdH, aLso knoWn aS vASOpressiN and ArgINine vasoPressin AVp), the mAjority OF Which iS relEAsEd fRom tHe sUPraoptIc NuCLeus iN The hypOthAlaMus. OxytociN, MOst of WhicH is rElEased frOm the paRaventrIcular NucleuS in tHe hYpOthALamUs. oxYtoCin Is oNe Of thE few HorMones TO CreAte a positive FEEdbacK Loop. for eXampLe, utERINe ContRAcTionS stIMUlaTe the reLeaSe of oxytOcIN froM tHe PosterioR pitUitaRY, which, In tUrn, inCreases uterIne conTRaCtioNs. thIS posITivE feEDBack loop coNtinues throuGHout laBOUr.