Soede N M, Bouwman E G, Kemp B
Wageningen Institute of Animal Sciences, Wageningen Agricultural University, The Netherlands.
Anim Reprod Sci. 1998 Dec 1;54(1):23-9. doi: 10.1016/s0378-4320(98)00140-7.
In gilts, seminal plasma treatment before or during the LH-surge has been found to advance ovulation in all animals by as much as 8 to 14 h. Two experiments were performed to assess whether such an advancement occurs in multiparous sows in which ovulation is induced by 750 i.u. hCG at 68 h after weaning. In both experiments, seminal plasma was inseminated at 4, 5 and 6 h after hCG (7 and 6 sows, respectively) and control sows (6 and 6 sows, respectively) were not inseminated. In Experiment 1, using Meishan semen, all sows ovulated between 38 and 44 h after hCG; no advancement of ovulation was seen due to treatment. In Experiment 2, using GY seminal plasma, 3 and 4 sows, respectively had started ovulation at 44 h after hCG. Again, no advancement of ovulation was seen due to treatment. Therefore, in both experiments, seminal plasma treatment within 4-6 h after hCG failed to advance ovulation to a similar extent as found in spontaneously ovulating gilts. It is unclear what causes this lack of effect. Maybe seminal plasma treatment does not advance hCG-induced ovulation or batches of seminal plasma differ in their ovulation-advancing properties.
在后备母猪中，已发现促黄体素激增之前或期间进行精浆处理可使所有动物的排卵提前8至14小时之多。进行了两项实验，以评估在经产母猪中是否会出现这种提前排卵的情况，这些经产母猪在断奶后68小时注射750国际单位人绒毛膜促性腺激素（hCG）诱导排卵。在两项实验中，均在注射hCG后4、5和6小时进行精浆授精（分别为7头和6头母猪），对照母猪（分别为6头和6头母猪）不进行授精。在实验1中，使用梅山猪精液，所有母猪在注射hCG后38至44小时排卵；未观察到处理导致排卵提前。在实验2中，使用GY精浆，分别有3头和4头母猪在注射hCG后44小时开始排卵。同样，未观察到处理导致排卵提前。因此，在两项实验中，hCG注射后4至6小时内进行精浆处理均未能像在自发排卵的后备母猪中那样使排卵提前到相似程度。尚不清楚造成这种无效的原因。也许精浆处理不会使hCG诱导的排卵提前，或者不同批次的精浆在促进排卵的特性上存在差异。
