The dual marker test or double marker test is a maternal serum screening test done to assess the risk of genetic disorders in the foetus. It is a part of prenatal screening performed during the first trimester of pregnancy to detect the risks of chromosomal abnormalities in unborn babies. These abnormalities can lead to chromosomal disorders, congenital irregularities, and miscarriages. Since this test is done early in pregnancy, the results can give expecting mothers enough time to make important decisions about further tests, treatments, and the overall management of their pregnancy.
Why is the Dual Marker Test Done?
The dual market test is highly recommended for women during their first trimester of pregnancy. The test is done to determine whether the fetus has a risk of developing any neurological disorder. It also helps in the detection of Trisomy 21.T, which can lead to heart issues, mental disorders, and other problems affecting different organs in the body. It is used for several purposes:
- It helps to detect Trisomy 18, also known as Edward syndrome
- It aids in determining if the unborn child has a risk of any type of neurological disorders
- The test also helps to see the risk of Trisomy 21.T in an unborn child, which causes heart conditions, mental disorders, and other health issues.
How is the Dual Marker Test Performed?
The dual marker blood test is a simple test done between the 9th and 13th weeks of pregnancy. The blood samples of an expecting mother are collected and checked for PAPP-A and hCG levels. The test can also be combined with an ultrasound examination or nuchal translucency (NT) scan of the baby. Generally, the test reports are generated in 3 to 5 days. Consult the healthcare provider for an accurate interpretation of the results and suggestions for further examination or medication.
While a double market test is helpful to determine the healthy growth of the foetus, a triple marker test after the 13th week of pregnancy is necessary to get a more comprehensive assessment of potential fetal abnormalities. This test measures three substances (AFP, hCG, and estriol).
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