DNA testing sites are adding a layer of complexity to the sensitive process of linking sperm donors and their biological families. But for those who donated before a 2005 cut-off date the process is more complicated - and increasingly being muddied by DNA testing sites. Further DNA testing showed the Queensland man was a 50 per cent match for the twin brothers. At the same time, some donors or recipients are instead finding out about biological family members on popular DNA testing websites, often accidentally. Donor Conceived Aotearoa spokeswoman Rebecca Hamilton said DNA testing had provided information to many donor-conceived people which the voluntary register could not.
