Persistence of pregnant mare serum gonadotrophin in plasma of Japanese quail (Coturnix coturnix japonica).
Pregnant mare serum gonadotrophin (PMSG) is currently being used to develop a hormone regime that will stimulate reproductive development in Japanese quail (Coturnix coturnix japonica). In this study, the persistence of PMSG in quail plasma was examined after a single injection of the hormone (500 IU). Plasma concentrations of PMSG increased to a peak 12 h after injection and declined to approximately 50% of peak concentrations 24 h after injection. Pregnant mare serum gonadotrophin concentrations declined gradually thereafter and had not returned to basal levels by 96 h after injection. Cloacal diameter, and ovarian and oviducal mass, had increased significantly by 96 h after injection. The persistence of PMSG in quail plasma has implications for the use of the hormone in future regimes stimulating reproductive activity in birds.
Girling
J E
JE
Centre for Women's Health Research, Monash University Department of Obstetrics and Gynaecology, Monash Medical Centre, Clayton, Victoria, Australia. jane.girling@med.monash.edu.au
Bennett
E J
EJ
Henderson
K
K
Cockrem
J
J
D000818:Animals; D002988:Cloaca / Q000033:anatomy & histology; D003370:Coturnix / Q000033:anatomy & histology / Q000097:blood*; D005260:Female; D006064:Gonadotropins, Equine / Q000008:administration & dosage / Q000097:blood*; D007700:Kinetics; D010053:Ovary / Q000033:anatomy & histology; D010057:Oviducts / Q000033:anatomy & histology
D006064:Gonadotropins, Equine