3rd anatomy scan

Caitlin
So on 11/2 (18w6d) I went in for my anatomy scan, we found out we were having a baby girl, we also found out she's extremely active! So active that we had to come back 2 weeks later for a second scan to get the rest of their views. So this past Wednesday I went back and they still could not see baby girls spine, be they did get better views of her heart. So the tech told me I'd have to come back again but had to do a level 2 scan. I didn't really think much of it until she told me there would be a nurse coming to talk to me, so I started thinking there might be something wrong. Well they noticed her kidneys a slightly enlarged, and since doing lots of reading I know it's not a huge deal and can take care of itself. So Friday I went to the hospital and had my level 2, they could finally see her spine that looked perfectly fine. But he kidneys were still slightly englarged (which I knew they would be) the doctor told me it's not really something to worry about, there's a good chance it could take care  of itself. But he did have to tell me it is technically a small marker for Down's syndrome. It is my only marker that I have. So instead of being 1in10,000 he said I'm more like 1in5,000 for it. He told me if I had more markers for it he would push for an amnio, but didn't think it was necessary. So I guess my question is how many ladies have being through this with perfect healthly babies?