Thomcat had similar genetic screening, her DD has a type of Downs that is supposed to be partly inherited (in my simple understanding). You could search archives for Thomcat, or post in the special needs section to get her attention.
so sorry for your losses, if you or your partner test positive to chromosonal abnormalities you will probably then be refered to a geneticist, who can then work out your odds for the abnormality to happen again. or can work out further test or even arrange IVF with pre genetic diagnosis (PGD) that can test the embroy before it is implanted.
i have had 4 miscarriages and I tested positive to chromosonal imbalance, although i also have had 2 children now. It is good that you are being assessed as there is so much they can do, try not to worry too much, we live in a lucky era.
I haven't been through what you are going through but DP and I were tested and given genetic counselling.
Our DD has Down's syndrome. She has familial translocation, which normally means one of the parents carries the extra chromosome. However on testing us it turns out that she is a fluke translocation. Just one of those wonderful things!