DNA Testing

September 2018:  The Daily Mail offers a great article about nature and nurture and what makes us who we are:  "...one of the country’s top psychologists and behavioural geneticists, Professor Robert Plomin, of King’s College London, offers an emphatic conclusion.  It is drawn from 45 years of research and hundreds of studies. He says the single most important factor in each and every one of us — the very essence of our individuality — is our genetic make-up, our DNA.  The basic building blocks of life that we inherit from our parents are what determine who we are — not how much they loved us, read us books or which school they sent us to.  DNA accounts for at least half the variance in people’s psychological traits, much more than any other single factor. Put simply, ‘nature’ trumps ‘nurture’ every time, and not just marginally, but by a long, long chalk.  Our DNA, fixed and unchangeable, determines whether we have a predisposition not just to physical traits — from how tall we are to how much we weigh — but also to our intelligence and our psychology, from a tendency to depression to having resilience and grit."

March 2018 Blog post:  Connecting on the DSR vs. on DNA Websites


April 2017: Half Siblings Headed to the March for Science!


June 2016:  A letter from the Editor-in-Chief of Human Reproduction. (This is not a "2016" issue....it's what we have been saying since 2005!):

Due to genetic testing donor anonymity does no longer exist

Many thousands of people worldwide have been conceived with donor gametes but not all parents tell their children of their origin. Genetic testing will make this impossible. Over three million people have already used direct-to-consumer genetic testing. The rapidly increasing availability of cheaper and more detailed tests poses numerous challenges to the current practice of sperm and egg donation: 1. Whether they are donating in a country that practices anonymous donation or not, donors should be informed that their anonymity is no longer guaranteed, as they may be traced if their DNA, or that of a relative, is added to a database. 2. Donor-conceived adults who have not been informed of their status may find out that they are donor-conceived. 3. Parents using donor conception need to be fully informed that their children’s DNA will identify that they are not the biological parents and they should be encouraged to disclose the use of donor gametes to their children. All parties concerned must be aware that, in 2016, donor anonymity has ceased to exist.  JLH (Hans) Evers, Editor-in-Chief Human Reproduction


Advice on DNA Testing

In addition to posting on the Donor Sibling Registry, people can also submit their DNA samples to either Familytreedna.com, Ancestry.com or 23andme.com. Half siblings will have roughly 25% identical DNA, donor-conceived people and their biological parent will share around 50% of their DNA.  If two people are in fact half siblings (or parent-child), they will see each other in their list of matches. After you get your DNA results, upload your raw data to gedmatch.com and Family Tree DNA (free). That makes you findable by people who tested in Ancestry, 23andme or Family Tree DNA. Read the articles below about how others have found donors and half siblings via DNA testing. Sometimes, connecting with close or even distant relatives can lead you to your half siblings and/or your donor. 

The DNAAdoption.com website has a lot of valuable information regarding DNA testing.


Articles and Advice About Connecting Via DNA testing

A sample letter:  What to say to your new DNA half sibling match when this news might be a shock to them?  Here is some sample verbiage for reaching out to a new half sibling that you have matched with via DNA testing (who might not know that they were donor-conceived, or that their mom or dad was a donor):  

Hi, it looks like we’re half siblings!   It looks like we are both children from a man who donated his sperm during the 1980’s.  I’ve known that I was donor conceived since I was 12 years old, and I’ve always been curious about my donor and my potential half-siblings.
In 2008 I joined the Donor Sibling Registry website (http://www.donorsiblingregistry.com) to make myself available for mutual consent contact.  There are 8 other donor-conceived people on that website who are also your half siblings! They are a great bunch of people and we all welcome you into our group with open arms. 
I realize that this might come as a surprise to you, and I also realize that this may be a sensitive or private subject within your family, so I want to assure you that I will be extremely respectful of your privacy regardless of how you may wish to connect.  I also understand that you might need some time to process this new information. 
If and when you’re ready, I’d be happy to discuss it all with with you!I In the meantime, I’d encourage you to check out the DSR website which is an excellent resource for reading research and personal stories about establishing these new family connections.



Ryan with Dr. James Watson (discovered DNA/the Double Helix). We sat in his office and chatted about DNA (even about finding your formerly anonymous sperm donor through DNA!), science, politics, religion, and life. It was fascinating, and an amazing privilege.