Endogenous opioid suppression of release of luteinizing hormone during suckling in postpartum anestrous beef cows

Beef cows were used to determine if suckling influences release of LH via endogenous opioids at 28 ± 4 d after parturition. Cows of similar weight and body condition (6.8 ± .1, 1=emaciated, 9=obese) were assigned randomly to five groups (n=6 to 7): 1) control-suckled/saline (suckled 15 min every 6 h...

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Veröffentlicht in:	Domestic animal endocrinology 1989-07, Vol.6 (3), p.183-190
Hauptverfasser:	Myers, T.R., Myers, D.A., Gregg, D.W., Moss, G.E.
Format:	Artikel
Sprache:	eng
Schlagworte:	ALLAITEMENT Anestrus Animals BEEF CATTLE Body Weight BOVIN DE BOUCHERIE Cattle - physiology CICLO ESTRAL COWS CYCLE OESTRAL endogenous opioid peptides Endorphins - antagonists & inhibitors Endorphins - physiology Female GANADO DE CARNE GONADOLIBERINE GONADOTROPIN RELEASING HORMONE Gonadotropin-Releasing Hormone - pharmacology HORMONA LIBERADORA DE GONADOTROPINA HORMONAS HORMONE HORMONES Kinetics LACTANCIA Lactation Luteinizing Hormone - blood Luteinizing Hormone - secretion Naloxone - pharmacology OESTROUS CYCLE PARTO PARTURITION POSTPARTUM INTERVAL Postpartum Period - drug effects Postpartum Period - physiology Pregnancy PUERPERIO PUERPERIUM Radioimmunoassay Reference Values SUCKLING VACA VACHE
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