Finding Birth Families with DNA–the Basics

DNA Testing for Birth Families–the Basics

DNA Hunters, LLC helps people use DNA for finding birth parents.  Every day, adoptees and other with unknown parents, such as foundlings, donor-conceived children, and others are able to find their birth families with DNA testing.  DNA is a powerful tool that can be used to find a birth father, for example.

DNA Testing

Typically, after someone has their DNA tested at one of the DNA testing companies, distant relatives are found, such as second, third, or fourth cousins.  From this, family trees are built “up” to grandparents, great grandparents, and further back.  Then, trees are build “down” to include all discoverable descendants of those ancestors.

Newly Found Cousins

Newly found cousins provide clues on possible birth families.   Known amounts of DNA sharing between relatives, such as those shown in ISOGG’s Autosomal DNA Statistics, are used to determine the most likely relationship between individuals.  In addition, DNA Hunters has a Possible Relationships Calculator that can be used to determine possible relationships.  All that’s needed for the Calculator is how much DNA is shared with a match.  With that information, the calculator tells you the possible relationships for that match.  These are arranged in groups.  That’s because oftentimes the shared amount of DNA might cover more than one possible relationship.  For example, if you share 1700 centiMorgans (cM) of DNA with a match, that person might be your grandparent or grandchild, your aunt or uncle, your niece or nephew, or your half-sibling.

To further determine who birth families are, it is oftentimes necessary to ask additional people to have their DNA tested.  This could be a possible first cousin, an aunt or uncle, a 1/2-sibling, or a parent.  Testing closer relatives oftentimes provides the information needed to confirm a birth family.

Finding Birth Parents – DNA Hunter’s Success Stories

Read about success stories of clients of DNA Hunters, LLC.