Sex education is the best way to prevent unwanted pregnancies and for women to know that they have the right to decide whether and when they want to be mothers. This simple guide for young people allows us to understand what abortion is, how it is performed, why it constitutes a right and what types of laws regulate it. For the authors of this book, knowledge about sexuality, contraception, the body itself or the voluntary interruption of pregnancy favors responsibility and freedom. As Almudena Grandes says in the prologue: "Knowledge is power, a weapon as important as slogans and banners, because no factor has done as much harm to women facing unwanted pregnancy as ignorance, obscurantism, and ideological manipulation."