![]() ![]() The ultrasound examination involves measuring the amount of fluid accumulated under the skinat the back of the baby’s neck. ![]() Both substances arenormally produced during pregnancy. The sample is then analyzed for twopregnancy hormones (usually free beta or intact hCG and PAPP-A). This sample may be takeneither by finger stick or by blood draw from the arm. The screening combines measurements from both a blood test and anultrasound examination.Ī small sample of the mother’s blood is required for the screening. National Association Down Syndrome How is the risk assessment done?įirst trimester screening is performed early in the pregnancy – usually between 10 ½ and 13 ½weeks of pregnancy.More information about Down syndrome can be found through local support groups or at: However, each childwith Down syndrome is unique. They usually have characteristic facial features and may haveother health conditions including an increased chance for congenital heart defects, thyroidproblems, infections, respiratory problems, vision and hearing problems. Children with Down syndrome experience developmental delay andsome degree of mental retardation. What is Down syndrome?ĭown syndrome is a genetic condition caused by having an extra copy of chromosome 21. What is first trimester risk assessment for Down syndrome?įirst trimester screening for Down syndrome, also known as nuchal translucency screening, is atest offered to women in their first trimester of pregnancy to determine the chance that they willhave a baby with Down syndrome.
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