| Yazarlar |
Prof. Dr. Cihan KAÇAR
Kafkas Üniversitesi, Türkiye |
Dr. Öğr. Üyesi Necdet Cankat LEHİMCİOĞLU
Kafkas Üniversitesi, Türkiye |
Prof. Dr. Hasan ORAL
Kafkas Üniversitesi, Türkiye |
Prof. Dr. Savaş YILDIZ
Kafkas Üniversitesi, Türkiye |
Prof. Dr. Semra KAYA
Kafkas Üniversitesi, Türkiye |
Doç. Dr. Mushap KURU
Kafkas Üniversitesi, Türkiye |
Abuzer Kafar Zonturlu
Harran Üniversitesi, Türkiye |
|
Şükrü Metin Pancarcı
Balıkesir Üniversitesi, Türkiye |
|
Örsan Güngör
Mehmet Akif Ersoy Üniversitesi, Türkiye |
|
Selim Aslan
Yakın Doğu Üniversitesi, Türkiye |
| Özet |
| The objective of this study was to evaluate pregnancy rates to timed artificial insemination (TAI) following presynchronization with a single dose of PGF2α ten days before CoSynch-56 protocol in Brown Swiss crossbred cows and heifers. Group I (GI) cows (n=89) and heifers (n=39) received PGF2α ten days prior to Cosynch-56 protocol while Group II (GII) cows (n=82) and heifers (n=38) received CoSynch-56 protocol only. Pregnancy was evaluated using ultrasonography 30-35 days after TAI. Pregnancy rates did not differ significantly between GI and GII (34.4% and 28.3 %, respectively, P>0.05). However, pregnancy rates differed significantly (P<0.05) between cows and heifers in GII (34.1% and 15.7%, respectively). Furthermore, pregnancy rates of heifers in GI was significantly higher than that of heifer in GII (P<0.01, 41.0% and 15.7%, respectively). Notably, pregnancy was not achieved in GII heifers with plasma P4 values < 1ng/ml. In conclusion, presynchronization with PGF2α before Cosynch-56 protocol did not enhance pregnancy rates in Brown Swiss cows but did in heifers. Also, high P4 levels may enhance overall pregnancy rates of cows and heifers subjected to the Cosynch-56 protocol. |
| Anahtar Kelimeler |
| cow | heifer | presynch | Cosynch-56 | pregnancy rate |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | REVUE DE MEDECINE VETERINAIRE |
| Dergi ISSN | 0035-1555 |
| Dergi Tarandığı Indeksler | SCI |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2015 |
| Cilt No | 166 |
| Sayı | 3 |
| Sayfalar | 90 / 95 |
