So sorry about you are having to go through this. I don't know the answer to your question, but I can share what has helped me get my body to release. I miscarried two and a half weeks ago at 13 weeks, though based on what I saw the baby died much earlier. (I didn't have any ultrasounds until the ER after the miscarriage was going on for a few days.) I spotted for two days with very light cramps, then started bleeding heavily with contractions/cramps during the night for the next three days but still didn't pass much tissue. I am still bleeding and passing membranes and pieces of placenta. What helped me the most so far was getting acupuncture, and especially taking the chinese herb formula Guanyin Qianyang Lu/GuanYin Pearls. Also, in the beginning my cervix seemed to have trouble opening so I inserted a sprig of parsley up against my cervix, changing it every 12 hours, or if I took a bath. That worked really well. I also took Evening Primrose oil. I also plan on sitting down tonight and writing my baby a letter saying goodbye and releasing him, because I know part of me is still holding on to the pregnancy and that is making it harder for by body to release. I hope some of this helps.