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腹腔镜人工授精技术应用于奶山羊繁殖试验

The application of laparoscopic artificial insemination in breeding experiments of dairy goats

  • 摘要: 腹腔镜人工授精是一种先进的辅助生殖技术,可以使精液在子宫内深度沉积,并有助于精子绕过小型反刍动物尾部生殖道的物理屏障,从而提高受孕率。为了将腹腔镜人工授精技术应用于大规模奶山羊繁育、提高生产效率,试验选择不孕奶山羊896只,对其生殖系统进行腹腔镜检查,对出现的可视繁殖疾病进行统计;选择牧场同期发情后待配母羊500只进行子宫颈口输精,选择另500只通过腹腔镜进行子宫角输精,对受胎率进行统计分析。结果表明:不孕奶山羊中仅有3.50%(31/896)的卵巢、子宫外形正常,其余均存在生殖疾病。母羊腹腔镜输精受胎率(85.20%)显著高于宫颈口输精(58.00%,P<0.05),且输精量少、术后恢复快。说明将腹腔镜技术应用于奶山羊规模化养殖中能够有效提高繁殖速率,降低牧场的饲养繁殖成本;可以利用腹腔镜对母羊生殖系统进行检查,确定子宫、卵巢等生殖器官病变,以淘汰无繁殖价值的母羊。

     

    Abstract: Laparoscopic artificial insemination is an advanced assisted reproductive technique that enables such deep intrauterine deposition of semen and helps bypass the physical barrier of the caudal reproductive tract in small ruminants, leading to higher pregnancy rates. In order to apply laparoscopic artificial insemination to large-scale dairy goat breeding to improve production efficiency, 896 infertile does were selected for laparoscopy for statistics of visualized reproductive disorders; 500 does selected after estrus synchronization for cervical insemination, and 500 selected for uterine horn insemination by laparoscopy were observed for the conception rate. The results showed that only 3.50%(31/896) of infertile dairy goats had normal appearance of ovary and uterus, and the rest had reproductive diseases.The pregnancy rates via laparoscopy yielded higher pregnancy rate(85.20%) with a reduced inseminated volume and a faster postoperative recovery when compared to the cervical insemination(58.00%,P<0.05). The findings suggested that the laparoscopic examination would be helpful to identify the infertile does, and the application of laparoscopic technology in the large-scale breeding of dairy goats can effectively improve the reproduction rate and reduce the breeding cost of pasture.

     

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