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Parnu Hospital

11 to 13 + 6 weeks Genetic Scan

The 11 to 13+6 weeks genetic scan, also known as the first-trimester screening, combines a blood test with an ultrasound to assess the risk of certain genetic conditions, like Down syndrome (trisomy 21), Edwards syndrome (trisomy 18), and Patau syndrome (trisomy 13). 

Here's a more detailed explanation:

  • What it is:

    This screening is a combination of a maternal blood test and a nuchal translucency test (ultrasound) performed between 11 and 13+6 weeks of pregnancy. 

  • Purpose:

    The primary goal is to assess the risk of chromosomal abnormalities in the fetus, such as Down's syndrome, Edwards' syndrome, and Patau's syndrome. 

  • How it works:

    • Blood Test: Measures the levels of two substances (free beta-hCG and PAPP-A) in the mother's blood. 
    • Nuchal Translucency Test (Ultrasound): Measures the thickness of the fluid-filled space at the back of the fetus's neck. 
  • What it checks for:

    • Increased risk of chromosomal abnormalities: A thickened nuchal translucency or abnormal blood test results can indicate an increased risk of Down's syndrome, Edwards' syndrome, or Patau's syndrome. 
    • Other potential issues: The ultrasound can also help identify other potential problems, such as fetal heart abnormalities. 

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