Effect of presynchronization strategy before ovsynch on fertility at first service in lactating dairy cows

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dc.contributor.authorAlkan, Ali
dc.contributor.authorOkut, Hayrettin
dc.contributor.authorWiltbank, Milo Charles
dc.contributor.buuauthorGümen, Ahmet
dc.contributor.buuauthorKeskin, Abdülkadir
dc.contributor.buuauthorYılmazbaş, Gülnaz Mecitoğlu
dc.contributor.buuauthorKarakaya, Ebru
dc.contributor.departmentUludağ Üniversitesi/Veteriner Fakültesi/Jinekoloji ve Doğum Anabilim Dalı.tr_TR
dc.contributor.orcid0000-0003-2817-3221tr_TR
dc.contributor.researcheridAAH-1406-2021tr_TR
dc.contributor.researcheridAAG-4440-2019tr_TR
dc.contributor.researcheridAAH-3831-2021tr_TR
dc.contributor.scopusid6602393069tr_TR
dc.contributor.scopusid24473229800tr_TR
dc.contributor.scopusid36457964000tr_TR
dc.contributor.scopusid36457784500tr_TR
dc.date.accessioned2021-12-10T11:37:36Z
dc.date.available2021-12-10T11:37:36Z
dc.date.issued2012-11
dc.description.abstractThe aim of this study was to evaluate the effect of presynchronization with or without the detection of estrus on first service pregnancy per artificial insemination (P/AI) and on Ovsynch outcome in lactating dairy cows. A total of 511 cows were divided randomly but unevenly into 3 treatment groups at 44 to 50 days in milk (DIM). Ovsynch was started at the same time (69 to 75 DIM) in all three groups. Cows in the Ovsynch group (CON, N = 126) received no presynchronization before Ovsynch, and all cows were bred by timed AT (TAI). Cows in the presynchronization with estrus detection (PED) and the presynchronization with only TAI (PTAI) groups received two doses of prostaglandin F-2 alpha (PGF) 14 days apart, starting at 44 to 50 DIM. Ovsynch was initiated 11 days after the second PGF treatment. Cows in the PED group (N = 267) received AI if estrus was detected after either PGF injection. Cows that were not determined to be in estrus after PGF injection received Ovsynch and TAI. Cows in the PTAI group (N = 118) were not inseminated to estrus, with all cows receiving TAI after Ovsynch. The ovulatory response to the first GnRH injection administered as part of Ovsynch differed (P = 0.002) among treatment groups (83.1% in PTAI, 72.6% in PED, and 62.7% in CON). However, the ovulatory response to the second injection of GnRH during Ovsynch did not differ among treatment groups. Of the 267 PED cows, a total of 132 (49.4%) exhibited estrus and were inseminated. The P/AI at the 31-day pregnancy diagnosis was similar between the cows in the PED group with AI after estrus detection (37.9%; 50/132) and those bred with TAI (34.1%; 46/135). The P/AI in the CON group (46.8%; 59/126) was greater (P < 0.05) than that in the PED group (36.0%; 96/267). In addition, the P/AI in the CON group was greater (P = 0.04) than that in the PED cows receiving TAI (34.1%; 46/135) but less than that in the PED cows bred to estrus (37.9%; 50/132) (P = 0.16). At the 31-day pregnancy diagnosis, the cows in the PTAI group had greater P/AI (55.9%; 66/118) than both those in the PED group (P < 0.01; either estrus or TAI) and those in the CON group (P = 0.08). Thus, presynchronization with PGF (PTAI) increased the ovulatory response to Ovsynch and improved P/AI in dairy cows. Interestingly, the breeding of cows to estrus during presynchronization reduced fertility to the TAI and overall fertility, including cows bred to estrus and TAI. These results indicate that maximal fertility is obtained when all cows receive TAI after the presynchronization protocol.en_US
dc.identifier.citationGümen, A. vd. (2012). "Effect of presynchronization strategy before ovsynch on fertility at first service in lactating dairy cows". Theriogenology, 78(8), 1830-1838.en_US
dc.identifier.endpage1838tr_TR
dc.identifier.issn0093-691X
dc.identifier.issn1879-3231
dc.identifier.issue8tr_TR
dc.identifier.pubmed22968033tr_TR
dc.identifier.scopus2-s2.0-84867403445tr_TR
dc.identifier.startpage1830tr_TR
dc.identifier.urihttps://doi.org/10.1016/j.theriogenology.2012.07.021
dc.identifier.urihttps://pubmed.ncbi.nlm.nih.gov/22968033/
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0093691X12004359
dc.identifier.urihttp://hdl.handle.net/11452/23170
dc.identifier.volume78tr_TR
dc.identifier.wos000310388200019tr_TR
dc.indexed.pubmedPubmeden_US
dc.indexed.scopusScopusen_US
dc.indexed.wosSCIEen_US
dc.language.isoenen_US
dc.publisherElsevier Scienceen_US
dc.relation.bapYDP 2009/3tr_TR
dc.relation.collaborationSanayitr_TR
dc.relation.collaborationYurt dışıtr_TR
dc.relation.collaborationYurt içitr_TR
dc.relation.journalTheriogenologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectReproductive biologyen_US
dc.subjectVeterinary sciencesen_US
dc.subjectDairy cowen_US
dc.subjectPresynchronizationen_US
dc.subjectOvsynchen_US
dc.subjectTimed artificial-inseminationen_US
dc.subjectOvulatory follicleen_US
dc.subjectPregnancy rateen_US
dc.subjectReproductive-performanceen_US
dc.subjectSynchronized estrusen_US
dc.subjectImproves fertilityen_US
dc.subjectEstrous-cycleen_US
dc.subjectHolstein cowsen_US
dc.subjectProtocolen_US
dc.subjectSizeen_US
dc.subjectBosen_US
dc.subject.emtreeGonadorelinen_US
dc.subject.emtreeProstaglandin F2 alphaen_US
dc.subject.emtreeAnimalen_US
dc.subject.emtreeAnimal diseaseen_US
dc.subject.emtreeArticleen_US
dc.subject.emtreeArtificial inseminationen_US
dc.subject.emtreeBreedingen_US
dc.subject.emtreeCattleen_US
dc.subject.emtreeEstrusen_US
dc.subject.emtreeEstrus cycleen_US
dc.subject.emtreeFemaleen_US
dc.subject.emtreeFertilityen_US
dc.subject.emtreeLactationen_US
dc.subject.emtreeMethodologyen_US
dc.subject.emtreeOvulation inductionen_US
dc.subject.emtreePhysiologyen_US
dc.subject.emtreePregnancyen_US
dc.subject.emtreeTimeen_US
dc.subject.emtreeTreatment outcomeen_US
dc.subject.meshAnimalsen_US
dc.subject.meshBreedingen_US
dc.subject.meshCattleen_US
dc.subject.meshDinoprosten_US
dc.subject.meshEstrus detectionen_US
dc.subject.meshEstrus synchronizationen_US
dc.subject.meshFemaleen_US
dc.subject.meshFertilityen_US
dc.subject.meshGonadotropin-releasing hormoneen_US
dc.subject.meshInsemination, artificialen_US
dc.subject.meshLactationen_US
dc.subject.meshOvulation inductionen_US
dc.subject.meshPregnancyen_US
dc.subject.meshTime factorsen_US
dc.subject.meshTreatment outcomeen_US
dc.subject.scopusArtificial Insemination; Estrus; Estrus Synchronizationen_US
dc.subject.wosReproductive biologyen_US
dc.subject.wosVeterinary sciencesen_US
dc.titleEffect of presynchronization strategy before ovsynch on fertility at first service in lactating dairy cowsen_US
dc.typeArticle
dc.wos.quartileQ3 (Reproductive biology)en_US
dc.wos.quartileQ1 (Veterinary sciences)en_US

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