R.B.
A., just be there for her....she is going to need a friend's shoulder to cry on. Just listen and let her do all the talking or crying. It will take a little time to grieve, but I'm sure she and her husband will be more anxious to hop on the bandwagon again. As a person who miscarried, I found peace quickly with what happened so hopefully she will too. I also couldn't wait to try again. One thing you can do is mark on your calendar the date the baby was due and then on that day you could do something special in remembrance.
The baby I miscarried would have been due last Thanksgiving, so on that day I had a hard time accepting the fact that no baby was coming. But luckily I was pregnant with my daughter at the time and that helped. :)
Praying for a quick recovery and peace.