about your dd's disability.
Is it possible to do a study of your own eggs or embies, either polar body biopsy or pgd, and find the good eggs/embryos?
I have a friend who is surro, and she didn't get pg on the fresh cycle -- the drugs seemed to interfere. She got pg on a natural cycle. You could try this, too, transferring the embies at the appropriate time. It works better for some women.