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首页> 外文期刊>Tropical Animal Health and Production >Estrous and ovulatory responses following cervical artificial insemination in Thai-native goats given a new or once-used controlled internal drug release with human chorionic gonadotropin
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Estrous and ovulatory responses following cervical artificial insemination in Thai-native goats given a new or once-used controlled internal drug release with human chorionic gonadotropin

机译：给予人工或绒毛膜促性腺激素新的或曾经使用过的受控内部药物释放后，泰国本地山羊进行人工授精后发情和排卵反应

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The study was conducted to compare estrous rate, ovulatory response, plasma progesterone concentrations, and conception rate following cervical artificial insemination in goats given a new or once-used controlled internal drug release (CIDR) device with human chorionic gonadotropin (hCG). Fifty-six Thai-native goats with the average age and body weight of 11 months and 17.3 kg received a 14-day treatment with a new CIDR device (Eazi-Breed(TM)CIDRA (R), Pfizer, NY, USA) or a once-used CIDR device. All goats received a 300-IU injection of hCG (ChorulonA (R), Intervet International B.V., New Zealand) at the day of CIDR removal to induce ovulation. All goats displaying signs of Estrous behavior were artificially inseminated at 12 h after the onset of estrus with frozen semen. No differences in percentage of estrus and ovulation rates were observed; however, goats that received once-used CIDR devices exhibited shorter (P 0.05) duration of estrus in comparison with new devices (21.4 A +/- 1.4 h vs. 26.1 A +/- 1.1 h) and delayed the onset of estrus (47.0 A +/- 3.6 h vs. 36.5 A +/- 1.9 h) and the time of ovulation (74.9 A +/- 3.9 h vs. 64.5 A +/- 1.3 h), respectively. Progesterone (P4) concentrations were not significantly different (P > 0.05) between treatments during CIDR device insertion and at the time of CIDR removal except on day 4. No significant differences were found in overall conception rates between the treatments. This study indicates that the once-used CIDR device with hCG could be applied to synchronize the estrus and ovulation in small-size Thai-native goats without negative effects on Estrous behavior, ovulatory response, and plasma P4 concentration.
机译：进行这项研究的目的是比较山羊的颈椎人工授精后的发情率，排卵反应，血浆孕酮浓度和受孕率，这些山羊采用新的或曾经使用过的具有人绒毛膜促性腺激素（hCG）的受控内部药物释放（CIDR）装置。平均年龄和体重为11个月，体重为17.3公斤的56只泰裔山羊用新的CIDR设备（美国纽约州辉瑞的Eazi-BreedTMCIDRA（R））进行了为期14天的处理，或者曾经使用过的CIDR设备。在CIDR去除的当天，所有山羊接受了300IU的hCG注射（ChorulonA（R），Intervet International B.V.，新西兰）以诱导排卵。发情开始后12小时，用冷冻精液对所有显示出发情行为迹象的山羊进行人工授精。没有观察到发情和排卵率的差异。但是，与新设备相比，接受过一次CIDR装置使用的山羊发情持续时间较短（P <0.05）（21.4 A +/- 1.4 h与26.1 A +/- 1.1 h），并且延迟了发情的发作（排卵时间分别为47.0 A +/- 3.6小时和36.5 A +/- 1.9小时，排卵时间（74.9 A +/- 3.9小时和64.5 A +/- 1.3小时）。除在第4天外，在CIDR装置插入期间和CIDR去除时，各治疗之间的孕酮（P4）浓度均无显着差异（P> 0.05）。这项研究表明，曾经使用过hCG的CIDR设备可用于同步小型泰国本地山羊的发情和排卵，而对发情行为，排卵反应和血浆P4浓度没有负面影响。

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