NT test results (x posting from ddc)

[hildare]

our average of the 3 measurements done right at 11 weeks 1 day is around 1.8.  while normal, and lower than the 3 cutoff, i am concerned that this is a high number.  the first measurement was actually above 2.

does anyone know about this or have a link to a chart that shows risk/numbers/by gest age?  thanks,

h

[XanaduMama]

I don't have a chart, but casual googling produced this:

http://www.babycentre.co.uk/pregnancy/antenatalhealth/scans/nuchalscan/#6

An NT measurement of up to 2mm is normal at about 11 weeks, and up to about 2.8mm by 13 weeks and six days. The NT normally grows in proportion with your baby. The image, left, shows a baby with a normal NT of 1.3mm; this baby will be low-risk. An increased NT does not mean there is definitely a problem. Some babies without Down's have increased fluid, too. The image, right, shows a baby with an NT of 2.9mm, which is at the upper limit of normal range. Nine out of 10 babies with a measurement between 2.5mm and 3.5mm will be completely normal.

hth

[hildare]

i located a calculator which will provide only a percentile and expected percentile based upon CTR length and NT measurements, thought i'd put that here if anyone else is searching for this info.

it's from perinatology.com  and the link is here.