Columbia subject headings:
Abortion--Law and legislation--United States.
Abortion--Moral and ethical aspects.
Abortion--Religious aspects.
Abortion--United States.
Harvard subject headings:
Abortion--Law and legislation--United States
Abortion--Moral and ethical aspects
Abortion--Religious aspects
Abortion--United States
Pro-life movement--United States
Princeton subject headings:
Abortion--Law and legislation--United States.
Abortion--Moral and ethical aspects.
Abortion--Religious aspects.
Abortion--United States.