i read before from a post another mum wrote on another site that anything smaller then 3.0mm nuchal fold is good. and i also found this for you to read. :
The result of the test is expressed either in terms of a risk assessment (eg. 1 in 300) or as positive/negative. The latter is the hospital or laboratory's interpretation of the former. A result of 1 in 300 means that about 299 people with this result will not have an affected baby, and only one will. As you can see, it is NOT a test for the presence of a DS baby, but a way of comparing your chance of having one to the risk for age alone. So, a 40 year old woman would be very reassured by a result of 1 in 10,000 and a 20 year old woman may opt for amniocentesis if her result was 1 in 50.
Some laboratories don't give a result like this, but have a predetermined cut-off at which the test is considered postitive. A positive test signifies that amniocentesis is recommended. Most use the cut-off of 1 in 250 as being positive (i.e. a risk assessment of 1 in 251 would be negative and 1 in 249 would be a positive result).
in my letter it didnt say i was low risk it said i was "not high risk"....so mabey i just scraped into the lower risk. i was never told my 1 in however many chance. i have been told both pregnancies that if there is any concerns over my results they will call and have a meeting rather then send a letter through the post. if your results were anything to worry about you would have been offerd an amniocentesis or some form of meeting or canceling. but like natalie said before if in doubt ask your mw or ring nhs :)
chelle,lilly(9months)& 24 1/2 week pink bump x