That's very interesting. Is that all that is good about it? A: No, there are quite a few good things about DTC genetic testing, actually. In addition to the benefit I just mentioned, the results of the test can also give parents useful information on their risk of being carriers of a genetic condition when they are considering having a child. If you know there is a chance you can pass on a genetic disease like thalassemia to your child, you can better prepare yourself.