Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorChatchote Thitaramen_US
dc.contributor.authorPornsawan Pongsopawijiten_US
dc.contributor.authorSaran Chansitthiweten_US
dc.contributor.authorJanine L. Brownen_US
dc.contributor.authorKannikar Nimtragulen_US
dc.contributor.authorKhajhonpat Boonpraserten_US
dc.contributor.authorPongpon Homkongen_US
dc.contributor.authorSittidet Mahasawangkulen_US
dc.contributor.authorSuvichai Rojanasthienen_US
dc.contributor.authorBen Colenbranderen_US
dc.contributor.authorGysbert C. Van Der Weijdenen_US
dc.contributor.authorFrank J.C.M. Van Eerdenburgen_US
dc.description.abstractA unique feature of the reproductive physiology of Asian elephants (Elephas maximus) is the occurrence of two LH surges before ovulation, instead of one. An anovulatory LH (anLH) surge, the function of which is unknown, occurs consistently 3 weeks before the ovulatory LH (ovLH) surge that induces ovulation. Thus, the ability to induce an ovLH surge would be useful for scheduling natural mating or artificial insemination. The present study tested the efficacy of a gonadotrophin-releasing hormone agonist (GnRH-Ag) to induce LH surges during the follicular phase of the oestrous cycle, which resulted in varied LH responses, but generally none were as high as previously documented natural surges. Thus, for the ovulation-induction trials, nine females were administered 80 g GnRH-Ag intravenously at three time periods during the oestrous cycle, namely the anovulatory follicular phase, the ovulatory follicular phase and the luteal phase. During the late anovulatory follicular phase, nine of 10 females (90%) responded with an immediate LH surge followed 1522 days later by an ovLH surge or a post-ovulatory increase in progestagens. In contrast, despite responding to the GnRH-Ag with an immediate increase in LH, none of the females treated during other periods of the oestrous cycle exhibited subsequent ovLH surges. One cow got pregnant from natural mating following the induced ovLH surge. In conclusion, ovLH induction is possible using a GnRH-Ag, but only during a specific time of the anovulatory follicular phase.en_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.titleInduction of the ovulatory LH surge in Asian elephants (Elephas maximus): A novel aid in captive breeding management of an endangered speciesen_US
article.title.sourcetitleReproduction, Fertility and Developmenten_US
article.volume21en_US Mai Universityen_US Universityen_US Elephant Instituteen_US and Research Center (National Zoo)en_US Mai Neurological Hospitalen_US
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.

Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.