The effects of gonadotropin releasing hormone on conception in postpartum anestrus angus beef cows and heifers

dc.contributor.advisorSalisbury, Michael
dc.contributor.authorBoenig, Michael Wade
dc.contributor.committeeMemberDr. Micheal Salisbury
dc.contributor.committeeMemberDr. Gil Engdahl
dc.contributor.committeeMemberDr. Kirk Braden
dc.contributor.committeeMemberDr. Charlene Bustos
dc.contributor.otherAngelo State University. Department of Agriculture.
dc.creatorBoenig, Michael Wade
dc.date.accessioned2013-01-22T14:20:08Z
dc.date.available2013-01-22T14:20:08Z
dc.date.issued2012-12-15
dc.date.submitted2013-01-22
dc.description.abstractThe objective of this study was to determine if a pre synchronization gonadotropin releasing hormone (GnRH) injection would increase conception percentages in postpartum anestrous angus beef cows and heifers. Sixty-four Angus females (42 multiparous cows and 20 heifers) from the Angelo State University’s Management, Instruction and Research Center were randomly assigned to two treatments groups at the beginning of the study. The control group were administered a two shot prostaglandin estrous synchronization protocol. The treatment group were administered a GnRH injection thirteen days prior to the two shot prostaglandin synchronization protocol. However, only 30 females showed signs of estrus and were artificially inseminated. Results in cows and heifers were similar, and no differences were found among the two treatment groups (P>0.05). Differences might be noted with a larger number of females that show signs of estrus. Conception was recorded by the use of ultrasound, and is a viable management tool.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2346.1/30026
dc.language.isoen_US
dc.subjectgonadotropin
dc.subjectAngus
dc.subjectGnRH
dc.subjectconception
dc.subjectanestrous angus
dc.titleThe effects of gonadotropin releasing hormone on conception in postpartum anestrus angus beef cows and heifers
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.departmentAgriculture
thesis.degree.disciplineAnimal Science
thesis.degree.grantorAngelo State University
thesis.degree.levelMaster
thesis.degree.nameMaster of Science

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