Teaddict - I lost my son in September in the same way at 35 weeks.
Your friend will probably be in shock and will not know what she needs or whats right now. But please call her and listen, let her know you are there for her. Call even if she doesn't answer she knows you rang that will mean the world to her. Everyone assumed our house was full of family and friends. It was niether as everyone stayed away scared of being near us thinking we needed space. It can be a very lonely place.
Your friend has had a birth experience and probably have held her baby, bathed him/her and dressed him and felt the love for him/her. I describe it, as do many angel mummies, as it being an awful day but also one full of love for my son. If you can read some stories from other parents who have been through the experience it might help you understand what they will be going through.
When you do speak to her let her know when you will call again (in 2 days time) don't offer to help say you 'will' help. Take the initiative, make things easier. Losing a child is a very lonely place. She may seem distant from time to time but she really really needs her friend right now and for the furture.
Please go to the SANDS website as there is advice for as a friend.
Remember she will never get over losing her baby and her baby will always be the first thing on her mind. From now and years to come. She doesn't just need you now she'll need your support forever.
She obviously has a good friend in you already xxx
My friend wrote a poem for our son, another sent us vouchers for his garden and they both kept in consistant contact with me even when I didn't pick up the phone for weeks. SANDS have been amazing for me to if she isn't aware of them make sure she is. Always include her baby in any cards and celebrations to come and mention his name when you talk with her. Her normal is now very different.