This type of testing is done to determine whether you have a greater chance of having diseases that show up later in life (late-onset diseases). If the family has a history of adult genetic disorder, preconception counseling; and testing for patients considering pregnancy is very useful.
3. Huntington's disease, a rare disease that causes premature, severe deterioration of the brain.
1. Breast cancer and ovarian cancer (BRCA-1 and BRCA-2 testing).
2. Familial adenomatous polyposis (FAP), which causes abnormal growths inside the colon and increases your risk of colorectal cancer.