Effect of Presence of Corpus Luteum at the Beginning of Ovsynch Protocol on Pregnancy Rates in Lactating Dairy Cows

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dc.contributor.authorCinar, Mahmut
dc.contributor.authorGuzeloglu, Aydin
dc.contributor.authorErdem, Huseyin
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2012
dc.departmentNiğde ÖHÜ
dc.description.abstractThe aim of the study was to investigate the effect of presence of CL at the beginning of Ovsynch protocol on pregnancy rates in lactating dairy cows. A total of 218 lactating Holstein cows that were at least 45 days postpartum with no reproductive disorders were used in the present study. Cows were divided into two experimental groups according to the presence and absence of corpus luteum (CL) on the first day of transrectal ultrasonography (day 0). Cows having CL (CL (+)) were randomly allocated to two subgroups as CL (+)/A and CL (+)/B. Cows in CL (+)/A group (n = 74) were treated with Ovsynch protocol, while cows in CL (+)/B group (n = 78) were treated with PGF(2 alpha) on the first day of examination and seven days later Ovsynch protocol was started. Cows having no CL (CL (-)) (n = 66) were left untreated on the first day of examination and Ovsynch protocol was started seven days later. Pregnancy rates were found 23%, 25.6% and 40.9% in CL (+)/A, CL (+)/B and CL (-) groups, respectively. The pregnancy rate in CL (-) group was significantly higher than those of CL (+)/A, and CL (+)/B groups (P<0.05). It is suggested that the success of Ovsynch synchronization protocol may be related to starting time of the protocol and to ovarian physiology in cyclic dairy cows.
dc.description.sponsorshipNigde University Research Project Unit [2008/21]
dc.description.sponsorshipAuthors thanks to Nigde University Research Project Unit (Project number: 2008/21) for financial assistance and Kocas Farm, General Directorate of Agricultural Enterprises (TIGEM) for animal material.
dc.identifier.endpage516
dc.identifier.issn1300-6045
dc.identifier.issue3
dc.identifier.scopus2-s2.0-84859183210
dc.identifier.scopusqualityQ3
dc.identifier.startpage513
dc.identifier.trdizinid130382
dc.identifier.urihttps://hdl.handle.net/11480/4641
dc.identifier.volume18
dc.identifier.wosWOS:000302602000027
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherKAFKAS UNIV, VETERINER FAKULTESI DERGISI
dc.relation.ispartofKAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCow
dc.subjectOvsynch
dc.subjectCorpus Luteum
dc.subjectPregnancy rate
dc.titleEffect of Presence of Corpus Luteum at the Beginning of Ovsynch Protocol on Pregnancy Rates in Lactating Dairy Cows
dc.typeArticle

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