Health care: an enigma.
D000068:Accreditation; D002568:Certification; D003363:Cost Control; D003695:Delivery of Health Care / Q000191:economics / Q000331:legislation & jurisprudence*; D005260:Female; D006176:Gynecology / Q000639:trends; D006801:Humans; D009774:Obstetrics / Q000639:trends; D011247:Pregnancy; D014481:United States