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Various Prenatal Diagnosis Tests

Posted on : 07 Feb 2020

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  • Dual Marker and Triple Marker Tests: These tests look at the level of certain hormones which are ‘markers’ associated with Down’s Syndrome.
  • Ultrasound Tests: They are used extensively, four-five times in the pregnancy. Here we look for markers for certain abnormalities. In the case of Down’s Syndrome, for example, certain physical characteristics suggest that the foetus has this condition. With an ultrasound at 18-19 weeks we can pick up lots of information on structural problems.  
  • Invasive Tests: These test the amniotic fluid, chorionic villus tissue or foetal blood. Sometimes we even do a skin biopsy of the baby. The other tests will give you a probable diagnosis – each one has its own proportion of false positives and false negatives. But when we test the tissue, we are actually looking at the genes, chromosomes, DNA, and this gives us a confirmatory result for certain genetic diseases.  Amniocentesis is an example of invasive test.

Article Related Questions

  1. Consider the following statements about Pre-natal diagnosis tests
    1.Dual Marker and Triple Marker Testslook at the level of certain hormones which are ‘markers’ associated with Down’s Syndrome.
    2.The use of Amniocentesis for sex determination is prohibited by law but its use for determination of disability in foetus is allowed.
    Which of the following statement(s) given above is/are incorrect?

  2. 1.1 only

    2.2 only

    3.Both 1 and 2

    4.Neither 1 nor 2

    Right Ans : Neither 1 nor 2

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