?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Suppression+of+infanticide+in+mother+rats&rft.creator=Peters%2C+L.+C.&rft.creator=Kristal%2C+M.+B.&rft.subject=Behavioral+Neuroscience&rft.subject=Animal+Behavior&rft.subject=Animal+Cognition&rft.subject=Behavioral+Biology&rft.subject=Ethology&rft.subject=Comparative+Psychology&rft.subject=Physiological+Psychology&rft.subject=Psychobiology&rft.description=In+order+to+test+the+hypothesis+that+infanticidal+tendencies+are+suppressed+when+rats+become+mothers%2C+very+young+newborn+pups%2C+either+naturally+born+or+cesarean-delivered%2C+were+presented+to+virgin+females+and+to+newly+delivered+mothers.+Provided+that+the+pups+were+lively%2C+uncleaned+of+fetal+fluids+or+membranes%2C+and+presented+without+placentas%2C+nearly+all+virgins+killed+and+nearly+all+mothers+did+not.+Newborns+were+also+presented+to+Day+22+pregnant+rats+and+to+rats+whose+pregnancies+had+recently+been+surgically+terminated.+Large+proportions+of+both+groups+either+were+nonkillers+or+were+actively+maternally+responsive+(and+a+smaller+proportion+were+both)+despite+the+fact+that+none+of+these+rats+had+undergone+parturition+or+cared+for+pups.+These+results+indicate+that%2C+independent+of+its+effect+on+maternal+caretaking%2C+pregnancy+suppresses+infanticide+in+previously+infanticidal+nulliparae+even+before+they+become+mothers.+Hence%2C+infants+are+protected+from+their+own+parents.+In+addition%2C+evidence+was+obtained+in+support+of+the+idea+that+freshly+delivered+pups+have+stimulus+properties+that+make+them+specially+suited+for+promoting+the+onset+of+maternal+caretaking.&rft.date=1983&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F760%2F1%2Finfant1.htm&rft.identifier=++Peters%2C+L.+C.+and+Kristal%2C+M.+B.++(1983)+Suppression+of+infanticide+in+mother+rats.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F760%2F