Debra Satz is Marta Sutton Weeks Professor of Ethics in Society and Professor of Philosophy at Stanford University. Her new book, Why Some Things Should Not Be For Sale: The Moral Limits of Markets, is a critical look at the commodity exchanges that strike us as most problematic. What considerations, she asks, ought to guide the debates about such markets? She offers a broader and more nuanced view of markets – one that goes beyond the usual discussions of efficiency and distributional equality – to show how particular markets shape our culture, foster or thwart human development, and support or undermine structures of power. In the excerpt below, from the chapter on women’s reproductive labor, Satz begins to tackle the questions involved in pregnancy contracts.