Re: Advice Please............
I (obviously) dont know too much about this, but thought I would weigh in with what little info I DO have, until Dr. Cusick can reply.
The cutoff for consideration of ventriculomegaly at 20 weeks would be 10mm. The fact that one is 10 and one 9, especially given the potential for measurement error, means that your baby is merely at the high end of normal, would be my guess. There is nothing "magic" about 10mm - it is just the cutoff below which some large percentage of normal babies show up, so personally I would not worry too much about that.
I do not know what to make of the NT measurement, other than to note that the NT test is supposed to be done by 13w6d (here in the States, at least), because that is the age range for which they have good risk estimates and means/medians/etc. The NT will naturally get larger as the baby grows, so I have no idea if 7mm is even outside of normal range - you should ask your dr what that measurement SHOULD be.
Finally, I really don't know what to say about the cerebellum being "a little small" - I do not know what that would mean, or how common that is, etc (I am an oceanographer, not a real doctor!).
Certainly, the baby would not develop a chromosomal problem late - if he/she had it, it was there all along, and simply missed or not expressed. But those odds are VERY good (I wish I had such great odds), and these new findings do not make those numbers go away.
Again, I am not a doctor, but my personal guess is that you have almost nothing (e.g., < 1:6000!) to worry about with regards to chromosomal issues. Hopefully Dr. Cusick will check the board this week and give you a more professional opinion though!
