The quad screen — also known as the quadruple marker test, the second trimester screen or simply the quad test — is a prenatal test that measures levels of four substances in pregnant women’s blood: Alpha-fetoprotein (AFP), a protein made by the developing baby.
What does the alpha-fetoprotein screen for?
Test Overview An alpha-fetoprotein (AFP) blood test checks the level of AFP in a pregnant woman’s blood. AFP is a substance made in the liver of an unborn baby (fetus). The amount of AFP in the blood of a pregnant woman can help see whether the baby may have such problems as spina bifida and anencephaly.
Why quadruple marker test is done?
The quad marker screen is a blood test that provides useful information about a pregnancy. It can help estimate your baby’s risk of Down syndrome, Edward’s syndrome (trisomy 18), and neural tube defects. The test predicts the likelihood of a problem.
When do you do a quadruple marker test?
This test is most often done between the 15th and 22nd weeks of the pregnancy. It is most accurate between the 16th and 18th weeks. A blood sample is taken and sent to the lab for testing.
What is AFP normal range?
An AFP level between 10 ng/mL to 20 ng/mL is normal for adults. An extremely high level of AFP in your blood—greater than 400 ng/mL—could be a sign of liver tumors. High levels of AFP may mean other cancers, including Hodgkin disease, lymphoma, and renal cell carcinoma (kidney cancer).
What causes elevated alpha fetoprotein?
High levels of AFP can be a sign of liver cancer or cancer of the ovaries or testicles, as well as noncancerous liver diseases such as cirrhosis and hepatitis.
How accurate is alpha fetoprotein screening?
This means it is not 100% accurate. It is only a screening test to see who might need more tests for their pregnancy. There can be false-positive results. These results show a problem when the baby is actually healthy.
What is alpha-fetoprotein (AFP)?
Introduction Alpha-fetoprotein (AFP) is a plasma protein produced by the embryonic yolk sac and the fetal liver. AFP levels in serum, amniotic fluid, and urine functions as a screening test for congenital disabilities, chromosomal abnormalities, as well as some other adult occurring tumors and pathologies.
What is the quadruple screen test for pregnancy?
The quadruple screen test is a blood test done during pregnancy to determine whether the baby is at risk for certain birth defects. This test is most often done between the 15th and 22nd weeks of the pregnancy. It is most accurate between the 16th and 18th weeks.
What is the AFP test for pregnancy?
These tests are also called the maternal serum triple or quad test, the expanded AFP test, the AFP plus test, or the multiple marker screening test. The amounts of these substances help your doctor find out the chance that your baby has certain birth defects, such as Down syndrome, spina bifida, or anencephaly.
Is the Quad screen safe during pregnancy?
The test poses no risk of miscarriage or other pregnancy complications. As with other prenatal screening tests, however, the quad screen can cause anxiety about the possible test results and what they might mean for your baby. Before the test, your health care provider might ask you to meet with a genetic counselor.
