It will come out on it's own. However, if she is really upset or having trouble coping with this maybe try to go with her to an appointment and make it clear that she needs to have this done and over with so she can start to heal. I have had two miscarriages. My first lasted three months. For three months, my doctor watched my hcg level ever so slowly drop. At exactly three months from the day I started bleeding, the rest of the placenta came out. It was horrible and I wish that on no one. She does not have to wait and if she can not get someone to listen to her, maybe you can help her out and light a fire under someone to help her. Hugs to you both.
at 12:51 AM on Dec. 29, 2010