Thanks, Starrynight! I still shake when I think about answering the phone. Taking the call with two toddlers crawling over me was difficult, and I didnt ask the quesitons I should have asked.
Like, if I was called in specifically for a high chance of Downs, which the FISH tells me the baby doesnt have, what is the chance that he/she has another chromosome abnormality. I think I drove them nuts with my drive to get statistics, but they drove me nuts refusing to give me specific answers!
Eg, if they have my due date significantly wrong (whcih I'm convinced they do) how did that alter the odds from the AFP. They kept telling me it didnt matter, but it did to me! In fact, once I got an answer, it seemed that the statistic went from 'more than one in ten' to 'about one in seventy-five' if I was right and they were wrong about my due date. A huge difference, imo!
She did tell me that there is a 0.3% chance of the FISH being wrong, but I didnt find out what the chances are statistically of something coming up on the other 16 or so abnormalities the amnio tests for.
Still, I'm a lot more confident now and able to focus a little more on other things. Which is a good thing as I have a huge work deadline for Friday and haven't even opened the document since I got the first phone call about the AFP!