Difference Between Quadruple and Dual Marker Test
Double marker and quadruple marker tests are recommended for women during pregnancy. These tests are conducted in the first and second trimesters of the pregnancy to check for any genetic disorder or risk for certain birth defects in the unborn child. In the first trimester, a double marker test, also known as maternal serum testing, analyses blood for specific chromosomal abnormalities. During the second trimester, a quadruple or quad screening test is used to assess the levels of four substances in a pregnant woman's blood. Women over the age of 35 and having a history of birth defects should consider getting dual and quadruple marker test at an affordable price . These tests, though they screen for any abnormalities in the growing foetus, are slightly different. Timing of Tests Dual Marker Test: There is a relatively slim window for conducting the dual marker test. Usually, it is conducted near the end of the first trimester, between weeks 11 and 14. The dual marke...