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Pregnant mare serum gonadotropin (PMSG) in estrus synchronization and multiple ovulation in ewes | ||
| Caspian Journal of Environmental Sciences | ||
| دوره 24، شماره 4، دی 2026، صفحه 1311-1315 اصل مقاله (572.19 K) | ||
| شناسه دیجیتال (DOI): 10.22124/cjes.2026.10079 | ||
| نویسندگان | ||
| Nuradin Alibayev1؛ Oralbek Alikhanov1؛ Orynbek Beketauov1؛ Kaliya Yerkekulova* 1؛ Abdilla Saipov1؛ Bakytzhan Azhibekov1؛ Daulet Doshanov1؛ Kairat Iskakov2 | ||
| 1M. Auezov South Kazakhstan Research University, Тauke khan St. 5, 160012, Shymkent, Kazakhstan | ||
| 2Kazakh Scientific Research Institute of Animal Husbandry and Food Production LLP, Zhandosova St. 51, Almaty, Kazakhstan | ||
| چکیده | ||
| The aim of this study was to evaluate the effects of different doses of pregnant mare serum gonadotropin (PMSG, eCG) on estrus synchronization and the ovulatory response in ewes. The proposed experimental design included 60 clinically healthy ewes divided into three groups of 20 animals each. Following a 12-day progestogen treatment, the control animals received physiological saline, while the ewes in the first and second experimental groups were administered 500 and 750 IU of PMSG, respectively. The modelled results showed that estrus occurred in 60.0%, 90.0%, and 95.0% of the animals, respectively (p = 0.008). The interval from device removal to the onset of estrus decreased from 51.8 ± 6.7 h in the control group to 39.6 ± 5.4 and 34.2 ± 4.9 h in the experimental groups (p < 0.001), while the number of ovulations increased from 1.25 ± 0.44 to 1.85 ± 0.67 and 2.45 ± 0.76, respectively (p < 0.001). Pregnancy rates were 50.0%, 80.0%, and 75.0%, respectively (p = 0.092). The 750 IU dose produced the most pronounced ovulatory response but provided no advantage in pregnancy rate compared with the 500-IU dose. Within the framework of the model, the 500-IU dose demonstrated the most balanced combination of estrus synchronization, ovulatory response, and reproductive efficiency. | ||
| کلیدواژهها | ||
| Ewes؛ Pregnant mare serum gonadotropin (PMSG)؛ Equine chorionic gonadotropin (eCG)؛ Estrus synchronization؛ Ovulation؛ Prolificacy؛ Reproductive biotechnology | ||
| مراجع | ||
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