How is Double marker test done ? #double marker screening in pregnancy. #pregnancytest #prenatal

How is Double marker test / Down syndrome screening done ?

This test screens for blood levels of both free beta-human chorionic gonadotrophin (beta-hCG) and pregnancy-associated plasma protein A (PAPP-A).

Levels of hCG and PAPP-A may be either higher or lower than “normal” in pregnancies with these chromosomal abnormalities.

However, blood levels alone don’t produce your results. Instead, the blood test is used along with an ultrasound called a nuchal translucency (NT) scan, which examines the clear tissue at the back of your baby’s neck.

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[sandhyasingh]

Plz tell how to read report of dual marker