Originally Posted by
atomic sagebrush
Twins are always high risk, please don't worry about that. It says nothing about the health of your babies. It's just a way for them to categorize you needing a little extra attention medically to make sure you are having the healthiest pregnancy you can.
If they did do the blood test and find one or the other was chromosomally abnormal (which the chances of that are very much in your favor that both babies are perfectly healthy) then they would use ultrasound to detect some small abnormalities that are present in babies with chromosomal problems.