What is 'normal'

[Sunshine28]

I am going for a private combined nuchal transluceny scan in two weeks. I just wondered what is a 'normal' result? Sadly last time we got a 1:3 chance for Downs Syndrome and the pregnancy ended badly. I do know that usually with a reult under 1:250 or 1:150 depending on the hospital people are offerd a CVS/Amnio.....I have been trying to find out what is an average result but can't find this anywhere. It would be great to hear what all of your results were (for those of you who have had the test). I am hoping this will help me get some idea of at what point/result I would decide to go for a CVS..... Thanks!

I think the reason you can't find an 'average' is because there isn't one. It depends on such a large number of factors, including maternal age, lifestyle etc. that it would be impossible to average out.

In my first pregnancy aged 27 I got a 1:2500 result, this pregnancy aged 29 and no difference in lifestyle my result is 1:100,000.

Hi Sunshine. I do know that the results are heavily adjusted for age. So, at the age of 36 with my dd I had a 1:800 chance (all fine, obviously). With very similar results to me - bloods fine and the same measurement - a friend nearly 10 years younger had something like a 1:20,000 chance, so I would say there is no such thing as 'normal'/'average', only what is officially considered to be 'high' or 'low' risk, or what would be an acceptable risk when you take age into consideration.

A 41-year-old friend was given a result of 1:120, but her consultant said that at that age that was quite a good result. It's a tough call, and a very personal decision, I think. I also do know someone whose results were fine but her baby had Down's - unusual, but not unheard of. What I'm trying to say is, there are no guarantees, and it's a very personal decision. Good luck, and I'm sorry for your previous experience.