Effect of ?-carotene on ovarium functions and ovsynch success in repeat breeder cows
Yükleniyor...
Dosyalar
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
KAFKAS UNIVERSITY
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study was carried out to determine the effect of ?-carotene on ovarian function and pregnancy rates in repeat breeder cows. Twenty-six repeat breeder Holstein cows were randomly assigned into control (n=11) and carotene (n=15) groups. Cows were fed with diet in the form of total mixed ration (39.80% neutral detergent fiber and 16.20% crude protein of dry matter). Treatment cows received an intramuscular injection of ?-carotene (1 mg/kg) simultaneously with the first GnRH injection. Largest follicle (P<0.05) and corpus luteum diameters (P<0.01) together with serum progesterone (P<0.01), ?-carotene (P<0.05) and vitamin A (P<0.01) levels were all significantly higher in the carotene group on the day of PGF2? injection. At the second GnRH injection, largest follicle diameter (P<0.01), serum estradiol (P<0.01), ?-carotene (P<0.01), and vitamin A (P<0.01) levels were again higher in the carotene group. Serum estradiol (P<0.01) and ?-carotene (P<0.05) levels were still significantly higher in the carotene group at the time of AI. Ovulation response did not differ between groups after both first and second GnRH injection. The pregnancy rate was 27.2% in the control group, and 33.3% in the carotene group but this difference was not statistically significant. In conclusion, it was suggested that ?-carotene did not have any significant effects on ovulation or pregnancy rates in ovsynch-treated repeat breeder cows; however it increased serum estradiol and progesterone levels due to increased follicle size and corpus luteum functionality, respectively.
Açıklama
Anahtar Kelimeler
Cow, Ovary, Ovsynch, Pregnancy, Repeat Breeding, β-carotene
Kaynak
Kafkas Universitesi Veteriner Fakultesi Dergisi
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
15
Sayı
1
Künye
Çelik, H. A., Avcı, G., Aydın, İ., Bülbül, A., Bülbül, T. (2009). Effect of β-carotene on Ovarium Functions and Ovsynch Success in Repeat Breeder Cows. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, 15(1), 87-94.
