My NT test results are back and I'm really confused. I thought the NT scan and bloodwork would test for down's syndrome, trisomy 18 and 13.

I was faxed my results and the receptionist said it was normal, but I don't see a result for trisomy 13 - is there another name for it?

The test says:
Down's risk is 1/4,300 and trisomy 18 risk is 1/10,000 - those look good compared to my "age related risk".

But what do these numbers mean (and is one of them the trisomy 13?)

NT translucency is 1.06MoM?
PAPP-A is 1.62MoM?
hCG is 1.64MoM?
NT is 1.8mm

Thanks!!