Bupivacaine concentration and obstetric delivery.
D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002045:Bupivacaine / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D036861:Delivery, Obstetric / Q000379:methods*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011897:Random Allocation
D002045:Bupivacaine