Pain relief during labour.
D000328:Adult; D000771:Anesthesia, Intravenous; D000773:Anesthesia, Obstetrical; D003511:Cyclohexanols; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008614:Meperidine; D011247:Pregnancy; D014147:Tramadol
D003511:Cyclohexanols; D014147:Tramadol; D008614:Meperidine