Effect of GnRH administration on different days following embryo transfer on conception rates in beef heifers

dc.contributor.authorSatılmış, Fatma
dc.contributor.authorErdem, Hüseyin
dc.contributor.authorKaraşahin, Tahir
dc.contributor.authorAalkan, Hasan
dc.contributor.authorDursun, Şükrü
dc.contributor.authorGüler, Mehmet
dc.date.accessioned2024-09-03T11:26:03Z
dc.date.available2024-09-03T11:26:03Z
dc.date.issued2024
dc.departmentVeteriner Fakültesi
dc.description.abstractThis study investigated the effect of GnRH, administered on days 4 and 5 after the transfer of fresh embryos to beef heifers, on the conception rate. For this purpo-se, thirty Simmental cows were used as donors in the study. Progesterone-based protocol (eleven-day) was applied to the donors for estrus synchronization. In the synchronization of the recipients, the classical ovsynch protocol was applied. Uterine flushing was performed on the 7th day following artificial insemination of the donors. Code I and II quality fresh embryos were transferred to 117 recipient heifers suitable for transfer (?15 mm CL). Recipient heifers were divided into three groups; GnRH-4, GnRH-5, and control. After the embryo transfer intramuscular GnRH (10 ?g, Buserelin Acetate) was administered to the recipients on the 11th and 12th days of the cycle (4 and 5 days following the transfer). No administration was performed on heifers in the control group. On day 23 following the transfer, pregnancy examinations were performed with real-time ultrasound. Consequently, the conception rates of GnRH-4, GnRH-5, and control groups were 38.7%, 43.3%, and 33.9%, respectively (p > 0.05). As a result, GnRH administration on the 4th and 5th days following the transfer did not increase significantly the pregnancy rate. Since the pregnancy rates obtained in a high-cost biotechnological method such as embryo transfer are very important, the post-transfer GnRH administration can be recommended because there is a statistically insignificant numerical increase (approximately 10%) in the presented study. However, this strategy should be applied to a larger number of animals and be molecularly and endocrinologically evaluated.
dc.identifier.doi10.56385/magyallorv.2024.07.399-408
dc.identifier.endpage408en_US
dc.identifier.issn0025-004X
dc.identifier.scopusqualityQ4
dc.identifier.startpage399en_US
dc.identifier.urihttps:/dx.doi.org/10.56385/magyallorv.2024.07.399-408
dc.identifier.urihttps://hdl.handle.net/20.500.12451/12397
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherHerman Otto Intezet
dc.relation.ispartofMagyar Allatorvosok Lapja
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectEffect of GnRH
dc.subjectAdministration on Different Days
dc.titleEffect of GnRH administration on different days following embryo transfer on conception rates in beef heifers
dc.title.alternativeAz embrióátültetést követ? különböz? napokon adott GnRH-injekció hatása a tehenek vemhesülési arányára
dc.typeArticle

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