Best information after a loss

Rebecca
I'm a funeral director who works with a lot of women and families who have lost their child either by a miscarriage, SIDS, or other unfortunate causes. What I would really like to know is what was some of the best advice or words that you heard that started to help you with the grieving process. 
My husband and I have been TTC for a while now and I understand the frustration of waiting for that moment when the test says your pregnant and I know that doesn't compare at all to what someone experiences when that is taken from them. 
So, any advice or support that has helped you I would truly appreciate so that I can pass this on to these loving ladies and their families.