Oestrus synchronization with short-term and long-term progestagen treatments in goats: the use of GnRH prior to short-term progestagen treatment

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dc.contributor.authorKaraca, Fikret
dc.contributor.authorDogruer, Gokhan
dc.contributor.authorSaribay, Mustafa Kemal
dc.contributor.authorAtes, Cafer Tayyar
dc.date.accessioned2024-09-18T20:25:27Z
dc.date.available2024-09-18T20:25:27Z
dc.date.issued2010
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractThe aim of the present study was to determine the efficacy of the synchronization of oestrus using short- and long-term progestagen treatments in Hair goats at the onset of the breeding season, and to evaluate the effect of the exogenous GnRH administration immediately prior to short-term progestagen treatment on the reproductive performance. A total of 75 Hair goats, aged 2.5-5 years-old were used in this experiment. Goats were divided equally into three groups (n=25 per group). Animals in LT-FGA (long-term progestagen treatment), ST-FGA (short-term progestagen treatment) and Gn-ST-FGA (GnRH-short-term progestagen treatment) groups received an intravaginal sponge (day 0) containing 30 mg fluorogestone acetate (FGA) for 14, 8 and 8 days, respectively, plus 75 mu g cloprostenol i.m. 24 h before sponge removal and 400 I. U. equine chorionic gonadotrophin (eCG) i.m. at the time of sponge removal. In addition, the goats in the Gn-ST-FGA group received 10.5 mu g busereline acetate i.m. at the time of sponge insertion (day 0). Oestrus response for all treatment groups was 100%. The mean interval from sponge removal and the onset of oestrus for the LT-FGA, ST-FGA and Gn-ST-FGA groups was 28.0+/-1.0 h, 28.8+/-1.1 h and 33.1+/-2.0 h, respectively. No significant difference in onset of oestrus among groups was recorded. The pregnancy rate, kidding rate, multiple kidding rates and litter size were 72.0, 61.1, 45.5% and 1.6 in the LT-FGA, 70.8, 76.5, 69.2% and 1.8 in the ST-FGA and 58.3, 78.6, 63.6% and 1.6 in the Gn-ST-FGA groups, respectively. The pregnancy rates were similar in the LT-FGA (72.0%) and ST-FGA (70.8%). However, the kidding rate, multiple kidding rates and litter size were numerically higher in the ST-FGA (76.5%, 69.2% and 1.8, respectively) group than in the LT-FGA (61.1%, 45.5% and 1.6, respectively) group. Although not statistically different, pregnancy rate and litter size was lower in the Gn-ST-FGA group (58.3% and 1.6, respectively) compared with the ST-FGA (70.8% and 1.8, respectively). In conclusion, it can be said that oestrus synhcronization with long-term progestagen treatment (14 d-FGA- PGF(2 alpha)- eCG) could be replaced with short-term progestagen treatment (8 d-FGA-PGF(2 alpha)- eCG) without a reduction in oestrus rate and fertility parameters in lactating goats at the beginning of breeding season. However, the use of GnRH prior to short-term progestagen treatment (8 d-FGA-PGF(2 alpha)- eCG) do not have a positive effect on fertility parameters in goats.en_US
dc.description.sponsorshipScience Research Projects Commission of Mustafa Kemal Universityen_US
dc.description.sponsorshipthe authors would like to thank Mr. Mustafa Danaci for providing animals and housing to conduct this study. The authors thank the Science Research Projects Commission of Mustafa Kemal University for financial support.en_US
dc.identifier.doi10.4081/ijas.2010.e22
dc.identifier.endpage120en_US
dc.identifier.issn1594-4077
dc.identifier.issn1828-051X
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-84856067698en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage117en_US
dc.identifier.urihttps://doi.org/10.4081/ijas.2010.e22
dc.identifier.urihttps://hdl.handle.net/20.500.12483/10309
dc.identifier.volume9en_US
dc.identifier.wosWOS:000282633400022en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Ltden_US
dc.relation.ispartofItalian Journal of Animal Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGonadotropinsen_US
dc.subjectFGAen_US
dc.subjectPGF(2 alpha)en_US
dc.subjectOestrus synchronizationen_US
dc.subjectGoatsen_US
dc.titleOestrus synchronization with short-term and long-term progestagen treatments in goats: the use of GnRH prior to short-term progestagen treatmenten_US
dc.typeArticleen_US

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