title: Placental transfer of meperidine HC1.
mesh_terms: D000818:Animals; D002849:Chromatography, Gas; D005260:Female; D005865:Gestational Age; D007275:Injections, Intravenous; D008431:Maternal-Fetal Exchange; D008614:Meperidine / Q000008:administration & dosage / Q000097:blood*; D008722:Methods; D011247:Pregnancy; D012756:Sheep; D013997:Time Factors
chemical_list: D008614:Meperidine