What was, what is, and what may be.
D000368:Aged; D004465:Economic Competition; D005260:Female; D006176:Gynecology / Q000639:trends*; D006299:Health Services for the Aged / Q000639:trends; D006801:Humans; D007878:Legislation as Topic; D008318:Malpractice; D008875:Middle Aged; D009774:Obstetrics / Q000639:trends*; D014481:United States