"The women who bear children and the medical experts who assist them testify that pregnancy and childbearing are indeed labor. The fact that many women enter into such labor voluntarily and joyfully does not alter the fact that other women, under other circumstances, find childbearing too arduous, become pregnant through no choice of their own, and are then forced to complete the pregnancy to term by compulsion of state laws prohibiting voluntary abortion. It is the purpose of the Thirteenth Amendment to prohibit a relationship in which one person or entity limits the freedom of another person. In the absence of a compelling state interest or due conviction for a crime, the state’s forcing the pregnant woman through unwanted pregnancy to full term is a denial of her Thirteenth Amendment right to be free from “a condition of enforced compulsory service of one to another.” This is the very essence of involuntary servitude in which the personal service of one person is “disposed of or coerced for another’s benefit.”"