Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/33033
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dc.contributor.authorKarakaya, Ebru Bilen-
dc.contributor.authorRibeiro, Eduardo S.-
dc.contributor.authorBisinotto, Rafael S.-
dc.contributor.authorSantos, Jose Eduardo P.-
dc.date.accessioned2023-06-14T07:34:14Z-
dc.date.available2023-06-14T07:34:14Z-
dc.date.issued2019-07-01-
dc.identifier.citationKarakaya B. E. vd. (2019). ''Effect of presynchronization with prostaglandin F-2 alpha before the 5-d timed AI protocol on ovarian responses and pregnancy in dairy heifers''. Theriogenology, 132, 138-143.en_US
dc.identifier.issn0093-691X-
dc.identifier.issn1879-3231-
dc.identifier.urihttps://doi.org/10.1016/j.theriogenology.2019.03.019-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0093691X19300640-
dc.identifier.urihttp://hdl.handle.net/11452/33033-
dc.description.abstractThe objectives were the determine the effects of presynchronization with PGF(2)(alpha) 2 days before the 5-d timed artificial insemination (Al) protocol on ovarian responses and pregnancy per AI (P/AI) in dairy heifers. The hypothesis was that PGF(2)(alpha )m would induce responsive heifers to be in proestrus at the initiation of the timed Al protocol, which was expected to improve ovulatory responses and P/AI. Weekly cohorts of Holstein heifers were blocked by age and, within block, randomly assigned to remain as control (CON; n = 255) or receive PGF(2)(alpha) on experiment Day -10 (PG; n = 255). All heifers were subjected to the 5-d timed AI protocol (Day -8, GnRH + intravaginal progesterone controlled internal drug release insert; Day -3, PGF(2)(alpha) and insert removal; Day -2, PGF(2)(alpha); and Day 0, GnRH and AI). A subset of 22 blocks of heifers (n = 43) had their ovaries scanned by ultrasonography on experiment Days -8, -3, 0, and 2 and blood was sampled and analyzed for concentrations of progesterone on experiment Days -8, -7, -5, and -3. Pregnancy was diagnosed on experiment Days 32 and 60. On the day of the first GnRH of the timed AI protocol, PG heifers had smaller concentration of progesterone in plasma (CON = 4.5 +/- 0.5 vs. PG = 0.5 +/- 0.5 ng/mL), but larger follicular diameter (CON = 9.1 +/- 0.5 vs. PG = 11.0 +/- 0.5 mm), and a greater proportion of them had a follicle with at least 8.0 mm in diameter (CON = 61.9 vs. PG = 90.9%) than CON heifers, which resulted in increased ovulation to GnRH (CON = 19.0 vs. PG = 86.3%). Ovulation to the initial GnRH of the protocol increased as the concentration of progesterone in plasma decreased, from less than 20% when progesterone was greater than 5.0 ng/mL to more than 65% when progesterone was less than 1.0 ng/mL. More CON than PG heifers spontaenously ovulated before the day of timed AI. Detection of estrus on the day of timed AI did not differ between treatments (CON = 50.9 vs. PG = 46.6%), but P/AI on Days 32 (CON = 52.9 vs. PG = 61.1%) and 60 (CON = 49.0 vs. PG = 57.1%) after inseminationtended to be greater for PG than CON; however, the benefit to presynchronization was observed in heifers inseminated with conventional (CON = 54.7 vs. PG = 67.4%), but not in heifers inseminated with sex-sorted semen (CON = 50.9 vs. PG = 52.8%). Administration of PGF(2)(alpha) 2 days before initiating the timed AI protocol induced heifers to be in proestrus, which enhanced ovulation to the initial GnRH and favored pregnancy per AI, particularly in heifers inseminated with conventional semen.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectReproductive Biologyen_US
dc.subjectVeterinary Sciencesen_US
dc.subjectDairy heiferen_US
dc.subjectProstaglandinen_US
dc.subjectSynchronizationen_US
dc.subjectTimed AIen_US
dc.subjectGonadotropin-releasing-hormoneen_US
dc.subjectArtificial-insemination protocolen_US
dc.subjectEstrous-cycleen_US
dc.subjectProgesterone concentrationsen_US
dc.subjectLuteinizing-hormoneen_US
dc.subjectOvulatory follicleen_US
dc.subjectFertilityen_US
dc.subjectSynchronizationen_US
dc.subjectInitiationen_US
dc.subjectDominanceen_US
dc.subject.meshAnimalsen_US
dc.subject.meshCattleen_US
dc.subject.meshDinoprosten_US
dc.subject.meshDrug Administration Scheduleen_US
dc.subject.meshEstrus Synchronizationen_US
dc.subject.meshFemaleen_US
dc.subject.meshInsemination, Artificialen_US
dc.subject.meshOvaryen_US
dc.subject.meshOvulationen_US
dc.subject.meshOxytocicsen_US
dc.subject.meshPregnancyen_US
dc.subject.meshPregnancy, Animalen_US
dc.subject.meshProgesteroneen_US
dc.subject.meshRandom Allocationen_US
dc.titleEffect of presynchronization with prostaglandin F-2 alpha before the 5-d timed AI protocol on ovarian responses and pregnancy in dairy heifersen_US
dc.typeArticleen_US
dc.identifier.wos000469159900017tr_TR
dc.identifier.scopus2-s2.0-85064843459tr_TR
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.contributor.departmentBursa Uludağ Üniversitesi/Veteriner Fakültesi/Klinik Bilimler Anabilim Dalı.tr_TR
dc.identifier.startpage138tr_TR
dc.identifier.endpage143tr_TR
dc.identifier.volume132tr_TR
dc.relation.journalTheriogenologyen_US
dc.contributor.buuauthorGümen, Ahmet-
dc.contributor.researcheridAAH-1406-2021tr_TR
dc.relation.collaborationYurt dışıtr_TR
dc.relation.collaborationSanayitr_TR
dc.identifier.pubmed31022603tr_TR
dc.subject.wosReproductive biologyen_US
dc.subject.wosVeterinary sciencesen_US
dc.indexed.wosSCIEen_US
dc.indexed.scopusScopusen_US
dc.indexed.pubmedPubMeden_US
dc.wos.quartileQ3 (Reproductive biology)en_US
dc.wos.quartileQ1 (Reproductive biology)en_US
dc.contributor.scopusid6602393069tr_TR
dc.subject.scopusArtificial Insemination; Estrus; Cattleen_US
dc.subject.emtreeOxytocic agenten_US
dc.subject.emtreeProgesteroneen_US
dc.subject.emtreeProstaglandin F2 alphaen_US
dc.subject.emtreeAnimalen_US
dc.subject.emtreeArtificial inseminationen_US
dc.subject.emtreeBlooden_US
dc.subject.emtreeBovineen_US
dc.subject.emtreeBreedingen_US
dc.subject.emtreeDrug administrationen_US
dc.subject.emtreeDrug effecten_US
dc.subject.emtreeEstrus cycleen_US
dc.subject.emtreeFemaleen_US
dc.subject.emtreeOvaryen_US
dc.subject.emtreeOvulationen_US
dc.subject.emtreePhysiologyen_US
dc.subject.emtreePregnancyen_US
dc.subject.emtreeRandomizationen_US
dc.subject.emtreeProceduresen_US
dc.subject.emtreeVeterinary medicineen_US
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