Home DNA tests doom anonymity for sperm, egg donors

All Ryan Kramer had to do was to swab his cheek and embark on nine days of genealogical research to identify his biological father, a man who thought he would remain anonymous when he donated his sperm and never took a DNA test himself. The year was 2005, when consumer DNA tests were in their infancy. Thirteen years later, the explosion of individual DNA test kits has opened the floodgates for people who were born from sperm or egg donations.