I am glad you have found comfort - I know well how comforting it is to find some answers. I lost 3 babies in the second trimester and had 3 miscarriages prior to Imogen's pregnancy. The anxiety your daughter is feeling is normal and natural given her circumstances.
Another 3-4 weeks in utero will be fabulous for your grandson - day at a time. Each day he spends in utero is a big plus.

Thinking of you all...