I never had bleeding
or cramping. It truly can take several weeks for
a natural m/c to happen. If she is strong enough emotionally to hold on, then she could try it naturally. But I was such a mess and opted for a D&C, had the D&C at exactly 13 weeks and still was no sign of it happening on its own. I had no regrets about having the D&C, there's no way I was going to wait another 6 weeks or longer to wait and see.