We recommend waiting one week after having serious surgery or radiation therapy before taking a sample. We suggest waiting 1-2 weeks after a blood transfusion as well. However, even if you take the sample right away, the medical treatment you have had should not affect the sample, and we will be able to get a good result.
Medical situations that would be of concern would be: known genetic disorders, bone marrow transplants, and/or facial reconstruction with donor skin grafts in the mouth. In any of these cases, please contact us and discuss the specifics of your situation to determine if we can get a usable sample.