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Evaluation of the efficiency of estrus synchronization protocols combined with natural service and ultrasonography on ewe reproductive performance during non-breeding season | ||
| Iranian Journal of Veterinary Research | ||
| دوره 25، شماره 1 - شماره پیاپی 86، 2024، صفحه 48-53 اصل مقاله (431.51 K) | ||
| نوع مقاله: Short paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijvr.2024.48021.6981 | ||
| نویسنده | ||
| P. R. Kumar* | ||
| Unit of Teaching Veterinary Clinical Complex, Faculty of Veterinary and Animal Sciences, RGSC-Banaras Hindu University, Mirzapur (UP)-231001, India | ||
| چکیده | ||
| Background: Estrus synchronization is an important assisted reproductive technology to improve the reproductive performance in ewes. Various protocols have been used with variable success rates, however; literature regarding field applicable estrus synchronization is meagre. Aims: The present study was designed with the aim to evaluate the estrus synchronization protocols on reproductive performance in ewes using different hormones. Methods: Experimental ewes were divided randomly into three groups (n=15). Ewes of all groups received intravaginal sponge for 12 days. Subsequently, NP4-GnRH and NP4-eCG groups received 8 µg of buserelin acetate or 200 IU of eCG intramuscularly, respectively on day 12 whereas NP4-Insulin group received insulin 0.2 IU/kg body weight subcutaneously for three consecutive days started on the day of sponge removal. Estrus detection commenced 24 h after sponge removal in NP4-GnRH and NP4-eCG groups and 24 h following last injection of insulin in NP4-Insulin group. The ewes in estrus were separated and pen mated. The conception rate was determined by ultrasonography. Results: The estrus response and conception rates were 71.43, 92.86 and 53.85%, and 70.00, 84.61, and 71.43%, respectively in NP4-GnRH, NP4-eCG, and NP4-Insulin groups. The lambing rates were the same as the conception rates. The single and multiple birth rates were 71.41, 36.36 and 60.0%, and 28.57, 63.64, and 40.0% whereas prolificacy was 128.57, 190.91, and 140.00%, respectively in NP4-GnRH, NP4-eCG, and NP4-Insulin groups. Conclusion: In conclusion, the estrus synchronization protocol including intravaginal progesterone sponge and eCG was found to be more effective under field conditions. | ||
| کلیدواژهها | ||
| eCG؛ GnRH؛ Insulin؛ Natural service؛ Vaginal sponge | ||
| مراجع | ||
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