when I was 5wks and had a M/C... it took me 4 FULL weeks of bleeding to actually pass everything in one big 'clump'. It looked like liver.
With passing it naturally, it can be painful, take a long time, and you risk infection if not everything comes out on it's own and still might need a D&C done.
Its really hard to say. Ive had 4 miscarriages and have done 2 of them natural and had d&c for the other 2. For me it took a few weeks to pass myself, before my body actually realized the baby had died and that I was no longer pregnant. Everyone is different. I'm so sorry for your loss.
I'm sorry Hilary that it happened. About six months ago I had a miscarriage where the baby didn't develop a heart at 6 weeks and I was told it never will. I got a second opinion a week later just in case and I was told the same thing. My body didn't reject it so my doctor prescribed me misoprostol to help my body ease it out. By that time she told me my body already started to reabsorb some of it. I hope this helps.
I did at around 9weeks and It wouldn't pass on its own quickly so I had an d&c done.