My doctor did that test along with my other blood test and it came back positive that I was a carrier. This is my third pregnancy and I have never been told this before. So its nice to know it now. But I am going to have my husband tested soon just to make sure he is not a carrier also. Even though my other two kids don't have it I could have just got lucky with them.
I got it done because my mom's cousin died from it. I'm a carrier but my husband is not so that's good :)
I did also mainly bc I had a cousin who had it
I had it done on my daughter when she was a few weeks old - literally a sweat test.
No needles no risks nothing.