Pain relief during labor.
D016362:Analgesia, Obstetrical / Q000191:economics* / Q000379:methods*; D000772:Anesthesia, Local / Q000191:economics* / Q000379:methods; D005260:Female; D018166:Health Care Reform / Q000191:economics; D006801:Humans; D007743:Labor, Obstetric; D017063:Outcome Assessment, Health Care / Q000191:economics; D010146:Pain / Q000517:prevention & control*; D010147:Pain Measurement; D011247:Pregnancy; D012051:Reimbursement Mechanisms; D012955:Societies, Medical; D014481:United States