In the thirty years since the first “test-tube baby,” in-vitro fertilization and other methods of reproductive assistance have become a common aspect of family life and medicine in developed nations—and, increasingly, throughout the world. This collection brings together ethnographic studies of how these reproductive technologies are deployed across a wide variety of nations and cultures, taking special account of how they are linked to aspirations towards modernity—and how they contribute to an ongoing reconfiguration of the boundaries of knowledge and human agency. The resulting volume offers both a current snapshot of the cultural state of reproductive technologies and a plethora of provocative questions for the future.