How are siblings who were conceived using the same sperm or egg donor making connections in the absence of legal support? What is it like to discover you are part of a fifty plus donor sibling group? How are donor-conceived adults using new technologies to connect with their genetic family and explore their identity? This edited collection considers the donor-linking experiences of donor-conceived adults and children, recipient parents, and donors in a global context. It includes contributions from legal academics, social workers, sociologists, psychologists, and policy makers who work in the assisted conception field. As a result, it will be of particular interest to scholars of reproductive law, sociology, and digital media and reproductive technologies. It will also engage those following the debate around donor linking and the use of do-it-yourself technologies, including direct-to-consumer genetic testing and social media.