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MRCOG PART 2 SBAs and EMQs

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Down screening

Down screening Posted by ghada S.

Dear Paul:

How can I calculate risk of Down syndrome from results of quadriple test ??"'As it is not done in our country routinlly"

How the risk is adjusted according to maternal age , gestational age & results of serum screening together??

The cut off value of risk for offering invasive testing is 1 / 150    so does this mean that any woman > 40 years should be offered invasive testing as her risk is 1 /100  even without need for serum screening ??

Please clarify with example 

Thank you