Learn about prenatal testing for chromosomal conditions. Ask your provider about prenatal screening and testing. A commonly used screening test is the prenatal cell-free fetal DNA (cffDNA) screening. This is a method to screen for certain chromosomal conditions in a developing baby, such as Down syndrome. During the screening, DNA from the mother and fetus is taken from the mother's blood. It's screened for the increased chance of specific chromosome problems, such as Down syndrome, trisomy 13 and trisomy 18.
Diagnostic tests such as chorionic villus sampling and amniocentesis can provide information about the risk of specific chromosomal conditions. These tests carry a slight risk of miscarriage. Your health care provider can help you weigh the risks and benefits.