Kendrick K M, Lévy F, Keverne E B
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge, UK.
Physiol Behav. 1991 Sep;50(3):595-600. doi: 10.1016/0031-9384(91)90551-x.
The importance of vaginocervical stimulation for the formation of the maternal bond between a ewe and its lambs was investigated by studying the ability of artificial mechanical vaginocervical stimulation to induce adoption of an alien lamb after the selective bond with the ewe's own lambs had been formed. Results showed that for both multiparous and primiparous ewes, 5 min of mechanical VCS (using a hand) was effective in inducing complete acceptance of an alien lamb (6-48 h old) between 6.5 and 7.5 h postpartum in the majority of animals (8/10 multiparous, 8/9 primiparous) without interfering with the bond between the ewe and its own lambs. In a second group of multiparous animals, 6 out of 7 animals were also induced to completely accept an alien lamb between 26.5 and 27.5 h postpartum. It was found that the most critical aspect of the VCS was pressure on, and stretching the neck of, the cervix. Results show that VCS is not only important for the stimulation of maternal behavior, but also for the formation of the selective maternal bond. The ability of VCS to trigger the formation of a new maternal bond extends for at least 27.5 h post-partum.
通过研究人工机械阴道宫颈刺激在母羊与其自身羔羊形成选择性纽带后诱导其收养外来羔羊的能力，探讨了阴道宫颈刺激对母羊与其羔羊之间母性纽带形成的重要性。结果表明，对于经产母羊和初产母羊，在产后6.5至7.5小时，5分钟的机械阴道宫颈刺激（用手操作）能有效诱导大多数动物（8/10经产母羊，8/9初产母羊）完全接受一只外来羔羊（6至48小时大），且不会干扰母羊与其自身羔羊之间的纽带。在第二组经产动物中，7只动物中有6只在产后26.5至27.5小时也被诱导完全接受一只外来羔羊。研究发现，阴道宫颈刺激最关键的方面是对宫颈施加压力并拉伸宫颈。结果表明，阴道宫颈刺激不仅对母性行为的刺激很重要，而且对选择性母性纽带的形成也很重要。阴道宫颈刺激触发新的母性纽带形成的能力在产后至少持续27.5小时。
