Peña F J, Domínguez J C, Carbajo M, Anel L, Alegre B
Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, University of León, Spain.
Theriogenology. 1998 Mar;49(4):829-36. doi: 10.1016/S0093-691X(98)00032-6.
Endogenous oxytocin is released by the sow at the time of mating in response to stimulation by the boar, which may explain, at least partially, the importance of the relationship between the boar's courting activity and the subsequent reproductive performance of the sow. The aim of this study was to determine the effects on reproductive performance of supplementing AI doses with exogenous oxytocin during the low fertility season. At an intensive piggery in northwest Spain 3 experimental groups were randomly formed and observed throughout the year. Group 1 sows were inseminated with semen supplemented with 4 IU oxytocin. Group 2 sows received 4 IU oxytocin injected through the vulvar lips mucosa at the time of insemination. Group 3 sows were inseminated without oxytocin and served as the controls. During the low fertility season the results for each group were as follows: farrowing rate 77.02, 56.25 and 54.39%, and litter size 10.77 +/- 0.28, 10.45 +/- 0.31 and 8.53 +/- 0.34 respectively. It is concluded that the addition of oxytocin to seminal doses just before AI is an easily applicable, effective method for increasing fertility and litter size during the summer months.
内源性催产素在母猪交配时由公猪刺激释放，这至少可以部分解释公猪求偶行为与母猪随后繁殖性能之间关系的重要性。本研究的目的是确定在低生育力季节向人工授精剂量中添加外源性催产素对繁殖性能的影响。在西班牙西北部的一个集约化养猪场，随机形成了3个实验组并进行了全年观察。第1组母猪用添加了4国际单位催产素的精液进行人工授精。第2组母猪在人工授精时通过外阴唇黏膜注射4国际单位催产素。第3组母猪在不使用催产素的情况下进行人工授精，作为对照。在低生育力季节，每组的结果如下：产仔率分别为77.02%、56.25%和54.39%，窝产仔数分别为10.77±0.28、10.45±0.31和8.53±0.34。得出的结论是，在人工授精前向精液剂量中添加催产素是一种在夏季增加生育力和窝产仔数的易于应用的有效方法。
