The comparison of the pregnancy rates obtained after the Ovsynch and double dose PGF2α + GnRH applications in lactating dairy cows

Creative Commons License

Doğruer G., Sarıbay M. K., Karaca F., Ergün Y.

Journal of Animal and Veterinary Advances, cilt.9, sa.4, ss.809-813, 2010 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 4
  • Basım Tarihi: 2010
  • Doi Numarası: 10.3923/javaa.2010.809.813
  • Dergi Adı: Journal of Animal and Veterinary Advances
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.809-813
  • Anahtar Kelimeler: Cow, Dairy, Ovsynch, Pregnancy, Prostaglandin, Timed artificial insemination, Turkey
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Hatay Mustafa Kemal Üniversitesi Adresli: Evet

Özet

This study was carried out to compare the pregnancy rates in timed artificial inseminations after Ovsynch and PGF2α, + GnRH applications on lactating dairy cows. The research was conducted in a commercial dairy farm on 84 lactating Holstein cows which the ages were ranging between 3-5 years old and between 80-120 days postpartum. The cows were randomly assigned to two groups as Ovsynch (n = 42) and Prosta Glandin (PG) (n = 42). The cows in Ovsynch group recieved 10.5 μg-1 GnRH at day 0, 500 μg-1 PGF2α at day 7 and 10.5 μg-1 GnRH at day 9 intramuscularly. The cows in PG group recieved 500 μg-1 PGF2α, two times with an interval of 14 days and 10.5 2α GnRH intramuscularly 48 h after the second PGF2α, injection. Artificial inseminations were applied to the cows in both of the groups between 16-20 h after the GnRH injections. The pregnancy diagnosis was performed 30 days after the artificial inseminations by ultrasonography. The pregnancy rates were determined as 35.7% (15/42) in Ovsynch group and 47.6% (20/42) in PG group. Although, the pregnancy rate were higher in PG group than the Ovsynch group the differrence was not statistically important (p>0.05). It was concluded that the programme consisted of 14 days interval double dose PGF2α injections, GnRH applications 48 h following the second PGF2α injection and timed artificial insemination 16-20 h after the GnRH injection could be an alternative to the Ovsynch programme in timed artificial inseminations. © Medwell Journals, 2010.