High NT waiting for NIPT

[Guest202402]

At my 12 week scan I measured 5.5, 2 days later I paid private and it was 4.9 and at my visit to fetal medicine I was 3.9. Is it normal for your NT to fluctuate like this?

I couldn’t have the combined bloods as they couldn’t measure baby CRL at my 12 week scan so was referred straight away. Now awaiting my amniocentesis test in 3 weeks however have paid for the NIPT.

Has anyone else’s NT decreased?

[MrsScotland]

Morning

It's normal for the NT to reduce as the fluid is reabsorbed. This is why the measurement can only be done between 11 and 13 wks 6 days - guidance does seem to vary slightly. I hate to say this but have a google to help explain it.

I had a very high NT of 8mm, when I went back two days later I asked if it had reduced and the Consultant said they wouldn't measure it again, the fact that it was high when measured the first time was enough. I went on to have the NIPT and it did come back high risk for T18. I didn't even have a CVS as baby was obviously poorly and I didn't want to prolong the limbo for a third week. A post mortem proved baby did indeed have T18.

[MrsScotland]

This is an excellent post, well worth a read

https://www.mumsnet.com/talk/antenatal_tests_choices/4939237-info-for-those-with-a-high-risk-screening-result