Journals / Kafkas Üniversitesi Veteriner Fakültesi Dergisi / 2014 / Cilt: 20 - Sayı: 6

Presenkronizasyon ile östrusu uyarılan Montofon ırkı ineklerde seksüel siklusun erken luteal döneminde uygulanan Cosynch protokolünde PGF 2 α ve GnRH uygulama zamanının değiştirilmesinin folliküler dinamik üzerine etkisi

The Effects on follicular dynamics caused by changing the Application Time of PGF 2 α and GnRh in the Cosynch protocol administered in Montofon cows with estrus stimulated by presynchronization

Pages
951–956
DOI
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⚡ TL;DR(Too Long; Didn't Read)

In conclusion, we determined that for cattle administered the Cosynch protocol on the 6th day of the sexual cycle, extending the application time of PGF2 α by one day in did not afect the size of the Graafian follicle.

📌 3 Key Takeaways

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Objective & Hypothesis:The objective of this study was to investigate how follicular dynamics are afected by changing the initial injection times of PGF 2α and GnRH in the Cosynch protocol in Montofon cattle that have been administered presynchronization.
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Key Findings & Data:Initially, all cattle whose corpus luteum was identified were administered an injection of PGF 2α.
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Conclusion & Impact:In conclusion, we determined that for cattle administered the Cosynch protocol on the 6th day of the sexual cycle, extending the application time of PGF2 α by one day in did not afect the size of the Graafian follicle.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The objective of this study was to investigate how follicular dynamics are afected by changing the initial injection times of PGF 2&#945; and GnRH in the Cosynch protocol in Montofon cattle that have been administered presynchronization. Initially, all cattle whose corpus luteum was identified were administered an injection of PGF 2&#945;. Six days after estrus was identified, the Cosynch protocol was started. In keeping with this, Group I (GI; n=9) was administered GnRH on day 0 and PGF 2 &#945; 7 days later. Fifty-six h later, artificial insemination was performed and GnRH was injected. In the second group of cows (GII; n=10), PGF 2 &#945; was administered in the Cosynch protocol 8 days after the first GnRH injection. Fifty-six h later, artificial insemination was performed and GnRH was injected. Development of the follicle and the corpus luteum was monitored each day with ultrasonography. On days 6, 7 and 8 of the procedure, a statistically significant diference in the follicle diameters was identified between the groups (P<0.05). No significant diference between the groups was identified in the dominant follicle diameter during artificial insemination (P>0.05). In conclusion, we determined that for cattle administered the Cosynch protocol on the 6th day of the sexual cycle, extending the application time of PGF2 &#945; by one day in did not afect the size of the Graafian follicle.

Özet

Bu çalışma ile presenkronizasyon oluşturulan Montofon ırkı ineklerde Cosynch protokolündeki ilk GnRH ile PGF 2 α uygulanma arası zamanının değiştirilmesinin folliküler dinamikleri üzerine etkisini araştırmak amaçlanmıştır. İlk olarak corpus luteum belirlenen tüm ineklere tek doz PGF 2 α enjekte edildi. Östrus tespitinden sonraki 6. gününde Cosynch protokolüne başlandı. Bu doğrultuda Grup 1’de (GI; n=9) 0. gün GnRH, 7 gün sonra PGF 2 α enjekte edildi. Bu uygulamadan 56 saat sonra suni tohumlama yapıldı ve GnRH enjekte edildi. İkinci gruptaki ineklerde (GII; n=10) ise Cosynch protokolündeki PGF 2 α, ilk GnRH enjeksiyonundan 8 gün sonra uygulandı. Bu uygulamadan 56 saat sonra suni tohumlama yapıldı ve GnRH enjekte edildi. Follikül ve corpus luteum gelişimi ultrasonografi ile günlük takip edildi. Uygulamanın 6, 7 ve 8. günlerinde gruplar arasında follikül çaplarında istatistiksel olarak önemli bir fark belirlendi (P 0.05). Sonuç olarak, seksüel siklusun 6. gününde Cosynch protokolü uygulanan ineklerde PGF 2 α uygulama zamanının bir gün uzatılmasının graaf follikülünün büyüklüğünü etkilemediği belirlendi.

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Cite This Article

KAÇAR, C., KAYA, D., YILDIZ, S., KAYA, S., KURU, M., PANCARCI, Ş. M., ZONTURLU, A. K. (2014). Presenkronizasyon ile östrusu uyarılan Montofon ırkı ineklerde seksüel siklusun erken luteal döneminde uygulanan Cosynch protokolünde PGF 2 α ve GnRH uygulama zamanının değiştirilmesinin folliküler dinamik üzerine etkisi. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 20 - Sayı: 6, 951–956. https://ajindex.com/articles/272706

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References (13)

  1. Fricke PM, Guenther JN, Wiltbank MC: Efficacy of decreasing the dose of GnRH used in a protocol for synchronization of ovulation and timed AI in lactating dairy cows. Theriogenology, 50, 1275-1284, 1998
  2. Pursley JR, Mee MO, Wiltbank MC: Synchronization of ovulation in dairy cows using PGF 2 alpha and GnRH. Theriogenology, 44, 915-923, 1995
  3. El-Zarkouny SZ, Cartmill JA, Hensley BA, Stevenson JS: Pregnancy in dairy cows after synchronized ovulation regimens with or without presynchronization and progesterone. J Dairy Sci, 87, 1024-1037, 2004
  4. Colazo MG, Gordon MB, Rajamahendran R, Mapletoft RJ, Ambrose DJ: Pregnancy rates to timed artificial insemination in dairy cows treated with Gonadotropin-Releasing Hormone or Porcine Luteinizing Hormone. Theriogenology, 2, 262-270, 2009
  5. Lucy MC, Savio JD, Badinga L, De La Sota RL, Thatcher WW: Factors that afect ovarian follicular dynamics in cattle. J Anim Sci, 70, 3615-3626, 1992
  6. Sartori R, Fricke PM, Ferreira JCP, Ginther OJ, Wiltbank MC: Follicular deviation and acquisition of ovulatory capacity in bovine follicles. Biol Reprod, 65, 1403-1409, 2001
  7. Brusveen DJ, Cunha AP, Silva CD, Cunha PM, Sterry RA, Silva EPB, Guenther JN, Wiltbank MC: Altering the time of the second gonadotropin-releasing hormone injection and artificial insemination (AI) during ovsynch afects pregnancies per AI in lactating dairy cows. J Dairy Sci, 91, 1044-1052, 2008
  8. DeJarnette JM, Marshall CE: Efects of Pre-synchronization using combinations PGF 2 alfa and (or) GnRH on pregnancy rates of Ovsynch- and Cosynch-treated lactating holstein cows. Anim Reprod Sci, 77, 51-60, 2003
  9. Kacar C, Yildiz S, Pancarci SM, Kaya M, Oral H, Gurbulak K, Gungor O: Administration of GnRH treatment prior to ovsynch protocol to stimulate cyclicity in cows with functional anoestrus. Bull Vet Inst Pulawy, 50, 497-501, 2006
  10. Kaçar C, Kamiloğlu NN, Uçar Ö, Arı UÇ, Pancarcı ŞM, Güngör Ö: Efect of Ovsynch and Cosynch synchronization programmes combined with β-carotene+Vitamin E administration upon the pregnancy rates in cows. Kafkas Univ Vet Fak Derg, 14, 45-50, 2008
  11. Yilmaz C, Yilmaz O, Ucar M: Efect of PGF 2α and GnRH injections applied before Ovsynch on pregnancy rates in cows and heifers. Kafkas Univ Vet Fak Derg, 17, 641-644, 2011
  12. Edmonson AJ, Lean IJ, Weaver LD, Farver T, Webster G: A body condition scoring chart for holstein dairy cows. J Dairy Sci, 72, 68-78, 1989
  13. Sanchez T, Wehrman ME, Kojima FN, Cupp AS, Bergfeld E