I totally understand what everyone is saying. We are going through this same situation right now as I am pregnant - and I also have EHK and my 14 year old daughter has EHK.
We will have a CVS performed the week of March 7 to see whether the baby has EHK as well and decide how to proceed.
It is such a hard path for me to follow right now and it is so nice just to be able to read what others have posted.
Thanks for allowing me to share.