Double marker test - This is the video on screening of down's syndrome done with the help of Double Marker Test along with Triple marker and Quadruple Marker

It’s also called as 1st trimester screening for down syndrome, Triosomy 18 and Triosomy 13.

Its just screening and not a diagnostic test for down syndrome

Dual marker test includes : 1. PAPP – A (Pregnancy Associated Plasma
Protein)

2. Beta HCG (Beta subunit of Human Chorionic Gonadotrophin)

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