How accurate is quadruple test?

[trying2bmomma]

Hi
I need an advice. I had my NT scan last week which didnot go well bcos of babys position. sonographer could not take a proper measurement. As procedure i have a quad test at 16 weeks. Just want to know how accurate is that? I am 13w1d. So i still have a chance for another scan may be private. Should i do that or wait for quad? anyone with similar experience?

 

[trying2bmomma]

Noone? Anybody please.....

 

[girlnboots]

The quad test comes up with a lot of false positives, something like 90% of the positives are false. However, the test itself is very good at finding real issues.

I didn't even get a scan between 10 and 19 weeks, but I had the quad test and it came back perfectly normal.