title: [Morphine concentrations in the serum following epidural administration--venous serum levels and placental transfer].
mesh_terms: D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002851:Chromatography, High Pressure Liquid; D005260:Female; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D008431:Maternal-Fetal Exchange; D009020:Morphine / Q000097:blood*; D011247:Pregnancy / Q000097:blood*
chemical_list: D009020:Morphine