The Effect of Time of eCG and PGF2α Administration on Fertility Parameters in Akkaraman Yearlings Treated by MPA in Non-breeding Season

Authors : Ahmet Gözer, Mustafa Kemal Saribay, Onur Bahan, Gökhan Doğruer, Mehmet Parlaktaş

Pages : 96-102

View : 66 | Download : 81

Publication Date : 2024-01-05

Article Type : Research Paper

Abstract :The aim of this study was to determine the effect of the administration of eCG and PGF2α at different times on some fertility parameters in Akkaraman yearlings aged 10-12 months synchronized with medroxyprogesterone acetate in the out-of-breeding season. A total of 75 Akkaraman yearlings were divided into two groups at random. Intravaginal sponges containing 60 mg of medroxyprogesterone acetate (MPA) were kept in the vagina for 9 days for estrus synchronizations. Group 1 and Group 2 received 500 IU eCG and 125 mcg d-cloprostenol 48 hours before sponge removal. Group 2 received the same treatment at sponge removal. The rams joined the herd for an hour twice a day 24 hours after the sponge withdrawal. Pregnancy examinations of the sheep were performed via transabdominal ultrasonography with 6-8 MHz real-time ultrasound probe (Falco, Pie Medical, Netherlands) 50 days after mating. Estrus onset times were 49.63 ± 7.67 and 50 ± 7.64 h in Group (I) and Group (II), respectively. Estrus, pregnancy, and conception rates were % 64.70, and %66.66; % 44.11, and % 52.77, % 68.18, and % 79.16 in group (I) and group (II), respectively. There was no statistical difference between the groups in terms of estrus onset times, estrus, pregnancy, and conception rates (p>0.05). In conclusion, eCG and PGF2a treatment at sponge removal was considered more advantageous in terms of labor. Also, it was seen that earlier matings can be obtained with the estrus synchronization protocols used without waiting for the breeding season.
Keywords : şişek, östrüs senkronizasyonu, eCG, farklı uygulama zamanları, PGF2α