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The triple marker test, also known as the triple screen or triple test, is a blood test performed during pregnancy. The test measures the levels of three substances in the mother's blood: alpha-fetoprotein (AFP), human chorionic gonadotropin (HCG), and estriol.
The test is typically performed between weeks 15 and 20 of pregnancy and can help identify the risk of certain birth defects and genetic conditions in the developing fetus.
The test can screen for:
Neural tube defects: These are birth defects that affect the brain and spinal cord, such as spina bifida.
Down syndrome: This is a genetic condition caused by an extra copy of chromosome 21.
Other chromosomal abnormalities: The test can also help identify other chromosomal abnormalities, such as Edwards syndrome or Patau syndrome.
It's important to note that the triple marker test is a screening test, not a diagnostic test. If the test results indicate a higher risk of a birth defect or genetic condition, further diagnostic testing such as amniocentesis may be recommended.
Preparing for the triple marker test is straightforward, and no special preparation is required. However, your doctor may advise you to avoid certain medications or supplements that could affect the accuracy of the test.
It's important to discuss the risks and benefits of the triple marker test with your healthcare provider to determine whether it's right for you.
This blood test is used to screen for certain birth defects, such as Down syndrome and neural tube defects. It may be recommended for women who are pregnant and have risk factors for these conditions.
The report is usually available within a day or two.
Typically requires a visit to a diagnostic center or a laboratory for the test.
Fasting is usually not required for this test.