Columbia subject headings:
Abortion--Law and legislation--United States--Congresses.
Abortion--Law and legislation--United States.
Abortion--United States.
Harvard subject headings:
Abortion--Law and legislation--United States--Congresses.
Abortion--United States--Congresses.
Constitutional amendments--United States
Fetus--Legal status, laws, etc.--United States
Pro-life movement--United States
Princeton subject headings:
Abortion--Law and legislation--United States--Congresses.
Abortion--United States--Congresses.