In order to perform a genetic test, the DNA sample can be obtained from various sources like blood, semen, hair, sputum, amniotic fluid, or even skin.
The common DNA samples that are clinically used for testing include:
- Blood samples are drawn from the vein with the help of a needle.
- In pregnant women, DNA sample is obtained either by amniocentesis or chorionic villus sampling. In these procedures, a needle is inserted through the abdomen and into the uterus and an amniotic fluid sample is drawn.
- An oral swab is also used as a DNA sample which is usually taken from the inner surface of the cheeks.
Once the DNA sample has been collected, it is sequenced, analyzed, and interpreted to obtain the results
