You counsel that the quad screen does which of the following?

You counsel that the quad screen does which of the following?

1.Measure chemicals from the baby’s blood
2.Look at the four aspects of down syndrome
3.Is less predictive than ultrasound screens
4.Predicts with 85-90 % certainty whether the baby has down syndrome
5.Has different levels of sensitivity depending on the mother age

sol:

The quad screen, drawn frommaternal blood at 15 to 21 weeks, combined with the mother’s age will give a risk ratio for the likelihood of Down syndrome. The four blood chemicals come fromthe placenta and fetus that diffuse into the maternal circulation. The sensitivity is increased as the incidence increases, thus it is affected by the mother’s age.