<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Amniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesia"^^ . "Amniotic fluid and placenta contain a substance (POEF, for Placental Opioid-Enhancing Factor) that, when ingested, enhances opioid-mediated analgesia in nonpregnant rats; ingestion of the substance by rats not experiencing opioid-mediated analgesia, however, does not produce analgesia. It is highly likely that periparturitional analgesia-enhancement is a significant benefit of ingestion of the afterbirth (placentophagia) during delivery. Here we report that prepartum ingestion of amniotic fluid (via orogastric infusion) does indeed enhance the endogenous-opioid-mediated analgesia evident at the end of pregnancy and during delivery; that the degree of enhancement is greater with 0.75 ml than with 0.25 ml, and that the prepartum enhancement of analgesia can be blocked with the opioid antagonist naloxone."^^ . "1990" . . "46" . "10" . . "Pergamon Press"^^ . . . "Life Sciences"^^ . . . . . . . . . . . . . . . . . . . . . . . "Mark B."^^ . "Kristal"^^ . "Mark B. Kristal"^^ . . "P."^^ . "Abbott"^^ . "P. Abbott"^^ . . "Jean M."^^ . "DiPirro"^^ . "Jean M. DiPirro"^^ . . "J. C."^^ . "Doerr"^^ . "J. C. Doerr"^^ . . "E.J."^^ . "Ferguson"^^ . "E.J. Ferguson"^^ . . "Alexis C."^^ . "Thompson"^^ . "Alexis C. Thompson"^^ . . . . . . "Amniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesia (PDF)"^^ . . . . . . "ls.pdf"^^ . . . "Amniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesia (Image (PNG))"^^ . . . . . . "preview.png"^^ . . "HTML Summary of #5769 \n\nAmniotic-fluid ingestion by parturient rats enhances pregnancy-mediated analgesia\n\n" . "text/html" . . . "Psychobiology" . . . "Neuropharmacology" . . . "Behavioral Neuroscience" . .