The dramatic growth of the databases is raising ethical challenges for the donor conception community. It has been recognised for some time that donor anonymity can no longer be guaranteed but this hypothetical threat is now very much a reality.
Donor conceived individuals are using genetic genealogy databases to match with genetic relatives and identify their biological parents, and there have been many success stories. There are now also a number of cases where people have accidentally discovered that they were donor conceived after taking a commercial DNA test. Some families who have used the services of a fertility clinic have learnt through DNA testing that the clinic owner substituted his own sperm for that of the father (see BioNews 931).