Effects of morphine and naloxone on spontaneous activity of fetal rats.
D000375:Aging; D000818:Animals; D005260:Female; D005333:Fetus / Q000502:physiology; D005865:Gestational Age; D007743:Labor, Obstetric; D008431:Maternal-Fetal Exchange; D009020:Morphine / Q000494:pharmacology*; D009068:Movement / Q000187:drug effects*; D009270:Naloxone / Q000494:pharmacology*; D011247:Pregnancy; D051381:Rats / Q000196:embryology*; D011957:Receptors, Opioid / Q000502:physiology
D011957:Receptors, Opioid; D009270:Naloxone; D009020:Morphine