Good CVS results, but I'm still concerned

[moneli]

Hello, at my 12 week scan the baby had a nuchal measurement of 3.9 ('normal' is up to 2.9) and there was no nasal bone. Both of these indicated the possibility of chromosomal abnormalities. I had a CVS yesterday at the Fetal Medicine Centre and thank goodness they were able to tell me my results today. Everything came back clear. This is great news and I know I should be really pleased, but instead I'm thinking 'WHY hasn't the baby got a nasal bone?' and 'WHY was the nuchal fluid measurement so high?' I know the latter can sometimes mean there are heart problems and I'll need more scans to check that out, but does anyone know what else (if anything) might be wrong?

Those things are just markers that increase the liklihood of chromosomal abnormalities, they don't mean that there actually is anything wrong. Some foetuses just grow nasal bones slightly later on in the pregnancy.

Of women who screen positive on the 12 week scan and go on to a diagnostic test (Amnio or CVS), 95% will be found to be carrying a non-affected baby.

Thanks Bearcrumble, the first sonographer we saw was just so full of doom and gloom that we came away expecting the absolute worst. The CVS result is as good as I could have hoped for and what you say is reassuring. I think I just need to relax now and enjoy Christmas! Hope you have a good one.

I've been told by sonographers that it can be quite tricky getting the nuchal measurement right - there may have just been some measurement error as well.