There are two types of prenatal testing available for Down Syndrome: screening tests and diagnostic tests. Only a diagnostic test will tell you for sure if your baby has Down syndrome.
The Global Down Syndrome Foundation and the National Down Syndrome Congress have created a pamphlet that explains the different kinds of tests and some of the things you should know about them. They are available in English and in Spanish:
Talking with a genetic counselor can help you understand the test results. Our First Call program coordinator can answer questions, connect you to Connecticut families who have experienced a prenatal diagnosis and help you find additional medical resources. Contact First Call by email at firstcall@mydsact.org or by phone at 888-486-8537.