?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Uterine+distention+facilitates+the+onset+of+maternal+behavior+in+pseudopregnant+but+not+in+cycling+rats&rft.creator=Graber%2C+Gary+C.&rft.creator=Kristal%2C+Dr.+Mark+B.&rft.subject=Psychobiology&rft.subject=Behavioral+Neuroscience&rft.subject=Animal+Behavior&rft.description=The+latency+to+onset+of+maternal+behavior+toward+foster+pups+was+examined+in+maternally-naive+female+rats+treated+either+with+uterine+distention%2C+a+sham+procedure%2C+or+no+uterine+manipulation.+Uterine+distention+was+achieved+by+intrauterine+injection+of+hypertonic+saline.+The+treatments+were+applied+to+either+cycling%2C+Day+10+pseudopregnant%2C+or+Day+11+pseudopregnant-decidualized+virgins.+The+latency+to+onset+of+maternal+behavior+for+both+pseudopregnant+groups+was+significantly+shorter+than+that+for+the+nonpseudopregnant+group%2C+when+uterine+distention+was+applied.+The+results+suggest+that+uterine+distention+during+pregnancy+(during+high+progesterone+level)+may+bring+about+both+pregnancy+termination+(delivery)+and+the+almost+immediate+maternal+behavior+seen+at+parturition%2C+by+the+same+hormonal+mechanism.&rft.publisher=Pergamon+Press+and+Brain+Research+Publ.&rft.date=1977&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F5770%2F1%2Futerine.pdf&rft.identifier=++Graber%2C+Gary+C.+and+Kristal%2C+Dr.+Mark+B.++(1977)+Uterine+distention+facilitates+the+onset+of+maternal+behavior+in+pseudopregnant+but+not+in+cycling+rats.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F5770%2F