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 ??