Publication:
Effect of GnRH and hCG treatment following a short-term estrus synchronization protocol on ovulation and the fertility in merino ewes, during the breeding season

dc.contributor.authorDoğan, I.
dc.contributor.authorToker, M. B.
dc.contributor.authorAktar, A.
dc.contributor.authorYılmaz, M. M.
dc.contributor.buuauthorDOĞAN, İBRAHİM
dc.contributor.buuauthorTOKER, MEHMED BERK
dc.contributor.buuauthorMenekşe Yılmaz, Mine
dc.contributor.buuauthorAktar, A.
dc.contributor.departmentBursa Uludağ Üniversitesi/Veteriner Fakültesi/Döllenme ve Suni Tohumlama Anabilim Dalı.
dc.contributor.orcid0000-0003-1976-1814
dc.contributor.orcid0000-0002-9242-8447
dc.contributor.researcheridA-2794-2014
dc.contributor.researcheridR-8366-2018
dc.contributor.researcheridAAG-6393-2020
dc.contributor.researcheridELR-5822-2022
dc.date.accessioned2024-10-07T13:12:44Z
dc.date.available2024-10-07T13:12:44Z
dc.date.issued2023-10-01
dc.description.abstractThis study aimed to compare the effect of hCG or GnRH administered 36 h following a short-term estrus synchronization treatment on the ovulation time and pregnancy rates of Merino ewes during the breeding season. The estrus cycles of ewes were synchronized with an intravaginal sponge containing 60 mg of medroxyprogesterone acetate for 6 days, and an injection of 400 IU of eCG and 125 mu g of d-cloprostenol 24 h before sponge removal. Thirty-six h after the sponge removal, ewes were injected intramuscularly either 1 ml of physiological saline solution (control-group; n=14), 100 IU of hCG (hCG-group; n=14) or 0.004 mg of buserelin acetate (GnRH-group; n=14). The estrus behavior was observed using teaser rams and the ovulation time was monitored using transrectal ultrasonography twice daily for 96 h after the sponge removal. Ewes in estrus were allowed a single mating using fertile rams. Estrus response was higher (P<0.05) in the control group (92.86%) than in the GnRH group (50.00%). The interval from sponge removal to ovulation and from hCG to ovulation were shorterin the control group than in the hCG group(70.55, 80.83 h; 34.55, 44.83 h, respectively, P<0.05). In conclusion, administration of hCG or GnRH at 36 h following a short-term estrus synchronization protocol did not affect estrus behavior, ovarian findings and pregnancy rate in ewes during the breeding season.
dc.identifier.doi10.12681/jhvms.31541
dc.identifier.issn1792-2720
dc.identifier.issue4
dc.identifier.urihttps://doi.org/10.12681/jhvms.31541
dc.identifier.urihttps://ejournals.epublishing.ekt.gr/index.php/jhvms/article/view/31541
dc.identifier.urihttps://hdl.handle.net/11452/46002
dc.identifier.volume74
dc.identifier.wos001165387800001
dc.indexed.wosWOS.SCI
dc.language.isoen
dc.publisherHellenic Veterinary Medical Soc
dc.relation.bapTGA-2021-432
dc.relation.journalJournal of The Hellenic Veterinary Medical Society
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectFollicular dynamics
dc.subjectReproductive-performance
dc.subjectArtificial-insemination
dc.subjectLuteal function
dc.subjectEstrous-cycle
dc.subjectTime
dc.subjectProgesterone
dc.subjectEwe
dc.subjectGnrh
dc.subjectHcg
dc.subjectOvulation
dc.subjectPregnancy rate
dc.subjectVeterinary sciences
dc.titleEffect of GnRH and hCG treatment following a short-term estrus synchronization protocol on ovulation and the fertility in merino ewes, during the breeding season
dc.typeArticle
dspace.entity.typePublication
relation.isAuthorOfPublicationa7e94363-2dfa-4005-bcdc-2980bfbbd641
relation.isAuthorOfPublication3224fce1-4344-4a25-bde9-a93ea14cb5fa
relation.isAuthorOfPublication.latestForDiscoverya7e94363-2dfa-4005-bcdc-2980bfbbd641

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