Influence of hormonal treatments on progesterone levels to enhance embryo survival and kidding rates in goats.

IF 2.4 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Animal Bioscience Pub Date : 2024-11-06 DOI:10.5713/ab.24.0578
Manita Wittayarat, Navapol Kupthammasan, Hakim Jehdo, Ratree Jintana, Sopita Suttikrai, Niraporn Tongkumtae, Nantarat Chutijiratthitkan, Pokchon Khirilak, Sirirat Norsoongnern, Supitcha Kaewma, Chaiyawan Wattanachant, Saritvich Panyaboriban
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Abstract

Objective: This study investigated the efficiency of different estrous synchronization programs and hormonal treatments in improving reproductive outcomes in goats. Conducted on a commercial farm in southern Thailand, the study used multiparous Shami and Anglo-Nubian breed goats.

Methods: In experiment 1, goats were randomly allocated to two estrous synchronization treatments: 11-day (CI11D) and 13-day (CI13D) intravaginal progesterone implants, followed by artificial insemination (AI) with frozen-thawed semen. Various hormonal treatments (human chorionic gonadotropin (hCG), GnRH analogue, progestogen) were administered on day 5 post-AI to elevate progesterone levels. Experiment 2 assessed embryo survival after transferring early- and late-stage embryos, using GnRH analogue to increase progesterone levels in the recipient goats.

Results: Results showed that GnRH analogue significantly increased pregnancy rates, kidding rates, and the number of kids born in the CI13D group. Progesterone levels were higher in treated groups, particularly with GnRH analogue, though estradiol levels varied between synchronization protocols. Late-stage embryo transfers significantly improved pregnancy rates and reduced embryonic loss compared to early-stage transfers. GnRH analogue supplementation reduced early embryonic mortality, enhancing embryo survival and overall reproductive performance.

Conclusion: This study demonstrates the efficacy of tailored estrous synchronization and hormonal treatments in optimizing goat reproductive outcomes, with significant implications for improving fertility management in commercial goat farming. Although no significant differences were observed in progesterone levels, the administration of GnRH analogue reduced early embryonic mortality and improved reproductive outcomes, demonstrating its potential to enhance embryo survival and reproductive performance in goats.

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激素治疗对孕酮水平的影响,以提高山羊胚胎存活率和产仔率。
研究目的本研究调查了不同的发情同步程序和激素治疗在改善山羊繁殖结果方面的效率。研究在泰国南部的一个商业农场进行,使用了多胎沙米山羊和盎格鲁努比亚种山羊:在实验 1 中,山羊被随机分配到两种发情同步处理中:11天(CI11D)和13天(CI13D)阴道内黄体酮植入,然后用冷冻解冻精液进行人工授精(AI)。人工授精后第 5 天,使用各种激素治疗(人绒毛膜促性腺激素(hCG)、GnRH 类似物、孕激素)以提高孕酮水平。实验 2 利用 GnRH 类似物提高受体山羊体内的孕酮水平,评估移植早期和晚期胚胎后的胚胎存活率:结果表明,GnRH 类似物能显著提高 CI13D 组的妊娠率、产仔率和产仔数。接受治疗组的孕酮水平较高,尤其是在使用 GnRH 类似物的情况下,但不同同步方案的雌二醇水平不尽相同。与早期胚胎移植相比,晚期胚胎移植大大提高了妊娠率,减少了胚胎损失。补充 GnRH 类似物降低了早期胚胎死亡率,提高了胚胎存活率和整体繁殖性能:这项研究证明了有针对性的发情同步和激素治疗在优化山羊繁殖结果方面的功效,对改善商业化山羊养殖的繁殖管理具有重要意义。虽然在孕酮水平上没有观察到明显差异,但施用 GnRH 类似物降低了早期胚胎死亡率,改善了繁殖结果,证明其具有提高山羊胚胎存活率和繁殖性能的潜力。
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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
5.00
自引率
0.00%
发文量
223
审稿时长
3 months
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