Using blood from the mother and saliva from the father, scientists can now determine whether a fetus has any chromosomal abnormalities that could cause a genetic disorder. 
For example, DNA testing can reveal if an unborn baby will have trisomy 21, or Down syndrome.
The Genetic sequence preserves information of someone’s life, beginning from his history into his present time.
Researchers are beginning to expand the field of prenatal genetic testing even further, using it to identify potential developmental delays and intellectual disabilities such as autism.

Genetic testing can also reveal risk factors you may have inherited from your parents, such as a high risk for breast or colon cancer. While this genetic risk factor does not guarantee you will get the disease, it does increase your chances; knowing about the risk (of one’s historical errors and immoral habits) may help you take preventive steps.