(she had a mid-term miscarriage - I have had one too and know how lonley and horrible it can be and also as it is rare hard to talk to people who have had one. I agonsied about the suitability of a card.)
One of the mums in the class organised a card and so I didn;t have to write sperately.
I just put:
"I am so sorry to hear of your loss. I, like you, also lost a son at 20 weeks gestation, this was 11 months before DS was born. I know how dark things can seem and I also know how healing time can be. You are in my thoughts every day. Yours, BBBee"
and I got a letter from her today saying:
"Dear BBBee,
I just wanted to write and thank you for your mesage. It arrived at a time when we both really needed it - thank you for sharing something so personal to help us."
So thanks everyone for the help and advice - you helped me do that.