TC, googled and found this:
"In The Fetal Medicine Foundation Project (Table 2), the prevalence of major abnormalities of the heart and great arteries was 10 per 1000 and increased exponentially with increasing translucency thickness from about 4 per 1000 for translucency of 95th centile?3.4 mm, 27 per 1000 for translucency of 3.5?4.4 mm, 43 per 1000 for translucency of 4.5?5.4 mm, 63 per 1000 for translucency of 5.5?6.4 mm, and 169 per 1000 for translucency equal to or greater than 6.5 mm."
Also:
"A specialist scan from 14 weeks can effectively reassure the majority of parents that there is no major cardiac defect." (My bold - a very important word, taken with your other results)
From this site, for reference, not for massive worrying yourself sick thinking about other possibilities and numbers, not that I've found any on here with a brief skim, but just don't anyway, OK, hun?
I hope this might make you feel a bit better (she said, hopefully) especially given your bloods and the nasal bone being present.
Hugs and will be thinking of you tomorrow. Lots of love, Hunker xxxxxxxxxxxxxxxxx
PS - am scared I've read this wrong and it will worry you more, if it does, I truly don't mean it too and am just a stupid Munker