Vaginal stimulation: an important determinant of maternal bonding in sheep.
The immediate induction of the full complement of maternal behavior in nonpregnant ewes primed with estrogen and progesterone has been obtained after 5 minutes of vaginal-cervical stimulation. A similar period of such stimulation given to recently parturient ewes, after the development of selective bonding to their own lambs, reversed their rejection behavior of alien lambs and produced a state of plasticity in maternal behavior, such that ewes receiving vaginal stimulation would accept and adopt alien lambs. These findings implicate vaginal-cervical stimulation as playing a role in the onset of maternal behavior.
D000818:Animals; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D008425:Maternal Behavior; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology; D012756:Sheep / Q000502:physiology*; D013997:Time Factors; D014621:Vagina / Q000502:physiology*
D011374:Progesterone; D004958:Estradiol