Genes2Me - Quadruple marker is a simple blood test performed during the second trimester (15-20 weeks) of #pregnancy to detect the risk of chromosomal abnormalities or congenital disabilities in the developing baby. #
![Second-trimester Down's syndrome serum screening: double, triple or quadruple marker testing? | Semantic Scholar Second-trimester Down's syndrome serum screening: double, triple or quadruple marker testing? | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/a6e3b51d330d7e804b9438010366e2119e968ca9/3-Table1-1.png)
Second-trimester Down's syndrome serum screening: double, triple or quadruple marker testing? | Semantic Scholar
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