title: Morphine in fetuses after maternal injection: increasing concentration with advancing gestational age.
mesh_terms: D000818:Animals; D001933:Brain Stem / Q000032:analysis; D004027:Diencephalon / Q000032:analysis; D005260:Female; D005333:Fetus / Q000032:analysis*; D005865:Gestational Age; D008099:Liver / Q000032:analysis; D008431:Maternal-Fetal Exchange; D009020:Morphine / Q000008:administration & dosage / Q000032:analysis*; D010920:Placenta / Q000032:analysis; D011247:Pregnancy; D051381:Rats; D013997:Time Factors
chemical_list: D009020:Morphine