With about four million births each year in the United States, it''s hard to imagine that infertility is of a particular concern to anyone. It is a major health concern, though, for as many as one in six U.S. couples who desperately want children and seem to be unable to have them. This book delves into the many issues concerning assisted reproductive technology, the causes of infertility, and various methods of treatment, The social implications of having "designer" babies, the costs of creating a child, and the controversy over using embryos for stem cell research are also investigated.