In six years in London, Ontario, the use of continuous lumbar epidural analgesia in deliveries increased from 5% to over 50%. Its effect was assessed in 1000 consecutive cases, all vertex presentations. In established labour, epidural analgesia was started for pain relief and was maintained with intermittent injections until delivery; in 34% the duration exceeded four hours. Labour was not retarded, but there was an inadvertent selection of patients with slow and painful progress. Forceps delivery was used in 89%, mid-forceps in 11.8% and forceps rotation in 17.7%; 2.4% required Cesarean section. Fetal condition was excellent (Apgar rating of 7 or greater in 96.7%). Postpartum complications could not be directly related to the technique. Continuous epidural analgesia gives superior relief of pain but calls for experienced anesthetists and adjustments in obstetrical management and nursing care.