The Comparison of the Pregnancy Rates Obtained after the Ovsynch and Double Dose PGF2? + GnRH Applications in Lactating Dairy Cows
Yükleniyor...
Tarih
2010
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Medwell Online
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study was carried out to compare the pregnancy rates in timed artificial inseminations after Ovsynch and PGF(2 alpha) + 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 mu g(-1) GnRH at day 0, 500 mu g(-1) PGF(2 alpha) at day 7 and 10.5 mu g(-1) GnRH at day 9 intramuscularly. The cows in PG group recieved 500 mu g(-1) PGF(2 alpha) two times with an interval of 14 days and 10.5 mu g(-1) GnRH intramuscularly 48 h after the second PGF(2 alpha) 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 PGF(2 alpha) injections, GnRH applications 48 h following the second PGF(2 alpha) injection and timed artificial insemination 16-20 h after the GnRH injection could be an alternative to the Ovsynch programme in timed artificial inseminations.
Açıklama
Anahtar Kelimeler
Ovsynch, prostaglandin, timed artificial insemination, pregnancy, dairy, cow, Turkey
Kaynak
Journal of Animal and Veterinary Advances
WoS Q Değeri
Q3
Scopus Q Değeri
N/A
Cilt
9
Sayı
4
