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dc.contributor.advisorSmith, Michael Fieldingeng
dc.contributor.authorJohnson, Cia L.eng
dc.date.issued2010eng
dc.date.submitted2010 Springeng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on June 14, 2010).eng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionThesis advisor: Dr. Michael F. Smith.eng
dc.descriptionM.S. University of Missouri--Columbia 2010.eng
dc.description.abstractThe GnRH-induced ovulation of small dominant follicles was associated with reduced pregnancy rates and late embryonic/fetal survival around the time of embryo-uterine attachment. PAGs are secreted by binucleated trophoblast cells into the maternal circulation and have been used to monitor placental function and embryo/fetal mortality. The overall objective was to examine the relationship between ovulatory follicle size and circulating concentrations of bPAG. Postpartum cows were treated with the CO-Synch protocol and timed artificial insemination and classified into one of four groups based on the size of the follicle induced to ovulate at GnRH-2. There was an effect of treatment on pregnancy rates at d 30 post insemination with pregnancy rate being higher following GnRH-induced ovulation of 14 to 15 mm compared to 12 to 13 mm follicles. The first increase in bPAG occurred on d 24. There was an effect of day on bPAG but no effect of ovulatory follicle size or ovulatory follicle size by day interaction from d 20 to 60. Furthermore, there was an effect of month on bPAG but no effect of treatment or treatment by month interaction from 3 months of gestation to calving. In summary, there was no effect of ovulatory follicle size on serum concentrations of bPAG in pregnant cows.eng
dc.description.bibrefIncludes bibliographical referenceseng
dc.format.extentxii, 88 pageseng
dc.identifier.merlinb79329512eng
dc.identifier.oclc648256665eng
dc.identifier.urihttp://hdl.handle.net/10355/8069
dc.identifier.urihttps://doi.org/10.32469/10355/8069eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
dc.subject.lcshBeef cattle -- Reproductioneng
dc.subject.lcshLuteinizing hormone releasing hormoneeng
dc.subject.lcshGlycoproteinseng
dc.subject.lcshOvulationeng
dc.titleEffect of ovulatory follicle size on bovine pregnancy associated glycoproteins in beef cattleeng
dc.typeThesiseng
thesis.degree.disciplineAnimal sciences (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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