Sep 21, 2025

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All living beings are forever connected to those that went before them through an unbreakable, undeniable genetic bond. While each of us is profoundly unique, the building blocks that make up our bodies have been passed down through thousands of generations. When adoption occurs, a child’s mind and heart become forever shaped by a family from a different lineage than their own, as no biological force is stronger than unconditional love and care. However, the clues to genetic ancestry still run deep within every cell. So when an adoptee decides they want to start searching for their biological relatives with little information to go on, DNA testing can seem like a great way to find their birth family. Let's explore this.

Genealogy websites, such as MyHeritage.com and Ancestry.com, have made the process of testing and matching DNA easier than ever before. This led to hopefulness for many adoptees, that their genes alone may provide the breakthrough they needed to find biological parents, siblings or other lost relatives they may not even know exist. However, it soon becomes clear to many that merely comparing genetic material is not always the ultimate key to the reunion they had been hoping for. Here is why DNA testing may be insufficient to find your birth family and what you can try instead:

How can you use DNA to find your birth family?

Our DNA is the genetic blueprint used to create all of our physical traits, determining all aspects from our external appearance (e.g. eye and hair colour) to the way our bodies are built and function. Each of us carries two sets of DNA: one from our birth mother and one from our birth father. Depending on complex genetic factors, some of our traits are determined by one set of DNA, and the rest by the other. This is why each child is a unique physical combination of the people who brought them into this world.

The amount and type of genetic information that you share with your biological relatives is specific to this kind of bond. So having a certain part of your DNA in common with another person can prove, often beyond a shadow of a doubt, that you are related by birth. Thus, your DNA can help your adoption reunion search by comparing your genetic profile with someone else's to determine whether you belong to the same biological family. On genealogy websites, this is achieved by comparing your profile against those of all the other users who allow this function. Your DNA can also be used to figure out whether a matching relative is a parent, a sibling or part of your extended family.

What are the drawbacks of using DNA testing to find your birth family?

Being able to instantly know for certain whether you are related to anyone in a genealogy website’s extensive database can be very alluring. However, it can often prove less helpful than it seems, for several reasons:

1. Not everyone gets their DNA tested, especially using the same provider

In this day and age, a growing number of companies offer DNA comparison services. Websites such as MyHeritage.com, Ancestry.com, or 23andMe.com are only some of the best known. This means that even if your birth relatives are among the 30-50 million people estimated to have had home DNA testing worldwide, there is no guarantee they have done so using the same website you did. If your genetic profiles are not in the same database, they will likley not be compared or matched.

2. People testing their DNA are not necessarily searching for lost family, which could blind-side them

There are multiple reasons why one would want to learn their DNA profile, curiosity about their ancestry being the most commonly cited. While some may get DNA testing in hopes of finding their birth family in a closed adoption of their own, most who aren't involved in an adoption situation have likely not even considered the possibility that a long-lost biological relative might get a DNA test in order to contact them. Contact from an adopted relative they didn't know about may come as a shock, and lead to unpredictable reactions. In fact,fear that the ones they are looking for may not be open to the idea of an adoption reunion is one of the most common fears that hold adoptees back from searching for their birth family.

3. Those who have done DNA testing may not have consented to matching

Even after having done a DNA test, not everyone will have selected the option to allow matching of their DNA data. This means that in spite of the high volume of people who have done testing, there is no guarantee that those who match you have consented for the match or for communication from those they don't already know.

4. Determining the nature of a match can be difficult and often impossible

When your DNA profile is matched with another’s, you will normally receive a genetic relationship estimation (e.g. parent, sibling, cousin, etc.). This is based on your amount of shared DNA, measured in units called centimorgans (cM). The larger the number of cM you have in common with your match, the more closely you are related. This can be straightforward in the case of a child/parent relationship. However, if you are matched with an aunt or uncle, a half-sibling or a cousin, it can be difficult to know the exact nature of your genetic connection, let alone which side of your family tree they may belong to. Locating a cousin by DNA match, for example, doesn't necessarily mean that a birth parent connection could ever be made, when you consider all of the possible relatives that lay between you and who you are seeking, including the fact that even those who are willing to try to help trace the connection with you might not have access to the person in question, who eventually may also be hiding their adoption history.

5. DNA testing provides limited information

The only information available to you about your DNA match on a genealogy website is whatever they decided to make available on their public profile. While some more open-natured users may share their real name, place of residence and complete family tree, most choose to protect their privacy. So you might only learn their username and country, which can be frustrating and unsatisfying. Contacting them directly via private messaging is usually an option for most platforms, but it can be difficult to reach out into the void to someone whose real name you don’t know and with whom you are genetically related in an unclear fashion.

6. Many users never return to genealogy platforms

As previously stated, most platforms provide a direct messaging function that allows you to communicate with your DNA match. However, since a substantial number of users get DNA testing out of pure curiosity, they may very often stop accessing the platform once they have received their results. This means that even if they haven’t deleted their profile, they may not return to the genealogy site to check their inbox in the near future. Even if they are notified by email that they have received a message from you, many of these communications are overlooked for a variety of reasons.

Is there a better way to search for your birth family?

This may feel like bad news in your search, however something to keep in mind is that an entire platform was created that mitigates the need for access to records or to DNA. There is therefore a simpler and more effective way to search for your birth family, which provides all the benefits of DNA comparison while removing all of the drawbacks. By using an online adoption reunion registry, you can access a dedicated platform where members who have also faced these challenges have successfully reunited with their families, even when DNA testing alone didn't help.

This service exclusively uses voluntary adoption records, provided by people who are trying to find their biological family members lost to adoption. Adopted.com is the largest international online adoption reunion registry, with a vast database comprised of millions of users all over the world (and growing larger every day) and incidentally also provides a DNA comparison function. Here is how it can help you search comfortably and efficiently, making the most of every piece of both genetic and experientially acquired information you possess:

Find your birth family with Adopted.com

Adopted.com is by far the best place to start an adoption reunion journey, regardless of how much or little you know about your birth family. Upon free registration, the user-friendly platform allows you to upload your DNA data for comparison with other members’, regardless of the source of the testing. Additionally, our proprietary profile matching algorithm uses any data you provide about yourself, your adoption and the birth family you seek to find similarities with those provided by other members. Finally, the Namesearch function allows you to search by keyword (name, birthday, place of adoption, etc.) both within the vast database as well as historical records made available by our partner platforms. These 3 ways to search on Adopted.com provide undeniable advantages in comparison to using a genealogy site alone, such as:

1. The safety of knowing that any birth family member you may find is also there in hope of finding you.
2. The ability to understand exactly how you are related to the people you match with.
3. The chance to get more information about the relatives you seek or even about your own adoption by searching through massive historical records databases.
4. The increased likelihood of finding a match by bringing together DNA profiles created by multiple genealogy sites.
5. The opportunity to make the most out of every piece of information you possess, by filling out our specially-designed questionnaire.
6. The comfort of a warm, friendly and caring customer support team that can help and guide you, ensuring your experience is smooth and rewarding.
7. The companionship of our tight-knit Adopted.com Community, where you can get advice and support from others who are on the same adoption reunion journey as you.
8. Many other features, with more being added continuously.

In the end, whichever path you choose to walk on your journey to find your birth family, and wherever the road may lead you, there is one thing no one can take away from you. That is the immense courage and determination it took to take this difficult step. We at Adopted.com wish you a comfortable and positive search experience, and that every day brings you closer to finding the match your heart yearns for.

Above all, we want to leave you with a message of hope. Even if you cannot find your biological family today, tomorrow brings new winds and a brand new chance that they will come searching for you in turn. As long as you carry them in your genes and inside your heart, reunion can always be right around the corner.