When I had an ambigious result on the Down's syndrome scan with DD, I chose not to tell my DM until after the amniocentesis tests results ( clear). During the waiting period, I had a scheduled scan and I know she was disappointed that I didn't ask her to come with me but I was so worried that the amnio test would be mentioned and as we were dealing with the potential implications ourself, I just couldn't cope with my DM's worry and questions at the same time. I hope this was for the best, but I have to admit to feeling guilty still, all those years later, when I casually dismissed her request to come to the scan. Sometimes you have to make decisions which are hard, but meant for the best reasons and only you can make them.