如本人或家族有病史，可以看医生，遗传咨询（genetic counseling），要先怀疑是什么病，再选择合适的DNA测试。比如乳腺癌，比如很多种儿童时期发病的遗传疾病都有专用的DNA测试。23andme原来提供基因变异检测，说某种基因变异和某病有关等等。FDA不容许这么做，所以他们现在好像专做家谱检验和产前检查。您可以Google一下。
http://www.acpm.org/?GeneticTestgClinRef
Genetic Testing Clinical Reference For Clinicians
Over 1,500 genetic tests are now available clinically, with nearly 300 more available on a research basis only. The number of genetic tests is predicted to increase by 25% annually. [3] There is a boom in the development of genetic tests using the scanning technology from the Genome Project, but questions remain regarding the validity and usefulness of these newer tests.
- Genetic testing holds immense promise for diagnosis and treatment. Medical professionals today, however, feel more skepticism than promise and for good reason.
- Many of the genetic tests offered today have little or no evidence of clinically proven value. Moreover, the regulatory infrastructure needed to apply due diligence on the utility and validity of these tests is largely nonfunctional or nonexistent. [4]
