title: Spread of epidural analgesia in early pregnancy.
mesh_terms: D000328:Adult; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D003080:Cold Temperature; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008012:Lidocaine / Q000008:administration & dosage / Q000378:metabolism; D010146:Pain; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012677:Sensation
chemical_list: D008012:Lidocaine