L.B.
I don't know what any correlation between protein levels and Down's are, but in reading some of your responses, it sounds like they are doing the amnio to rule out Down's. I am of advanced maternal age and had a baby in Nov. I denied the testing because our baby was a gift from God and His gifts go so far beyond anything we could ever request. And no matter what, I know that He will equip us for any child we have. My baby is now four months old. She is really healthy and strong and absolutely wonderful. She was referred for Down's testing at her two month check up, and it turned out positive that she is Down's. I look back on whether I'd have done things different on the prenatal testing; and, no, I wouldn't. I had a beautiful pregnancy and I'm so glad I didn't taint it with incorrect preconceived notions about Down's. I so grateful I got to know her before finding out about the Down's. I strongly recommend large quantities of vitamins during pregnancy and taking care of herself just as she would otherwise. Our daughter is really healthy and I attribute it to good nutrition and supplementation during pregnancy. It's hard to believe she is Down's because she is so strong and so with it.
Parenthood in general is a leap of faith, no matter what your circumstances are.
Best wishes!