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Test ID: QUAD
Quad Screen (Second Trimester) Maternal, Serum

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Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

NEURAL TUBE DEFECTS

An AFP multiple of the median (MoM) <2.5 is reported as screen negative. AFP MoMs > or =2.5 (singleton and twin pregnancies) are reported as screen positive. 

 

DOWN SYNDROME

Calculated screen risks <1/270 are reported as screen negative, risks > or =1/270 are reported as screen positive.

 

TRISOMY 18

Calculated screen risks <1/100 are reported as screen negative, risks > or =1/100 are reported as screen positive.

 

An interpretive report will be provided.



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