He fixed his eyes on the triple screen.

Should I have the maternal serum triple test (triple screen)?

You walk into a flagstone-floored hall with a triple arched screen.

Balthasar didn't answer, staring at the triple screens as though he could force them to change by sheer strength of will.

These tests are the quad marker screen and triple screen.

Right from the credits sequence, with a double becoming a triple screen we know we're in for a goody.

But the triple screen also has its limitations.

To detect one case of Down syndrome, 54 women with positive triple screens would have to undergo an amniocentesis.

And, as with age, the triple screen sometimes suggests a high risk of Down syndrome when none exists.

The quad test is a little more accurate than the triple screen, but it might not be available everywhere.