A study of the effects of pain relief in labour.
D000698:Analgesia; D000765:Anesthesia, Conduction; D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007231:Infant, Newborn / Q000187:drug effects*; D007743:Labor, Obstetric; D010146:Pain / Q000188:drug therapy; D010808:Physical Examination; D011247:Pregnancy; D013223:Statistics as Topic