I have never heard that before. I am still getting green stones. That is the only thing I ever have gotten (in 34 flushes over 2+ years), always kind of pea size, nothing black, white or any other color.
I saw Andreas in October and he said as long I used prescription drugs I would keep making stones. I stopped them all but I still get green peas. It might, may be , depend on what kind of food I eat and my body reacts to it.
So may be at the end of the month I will find out if I get an US.
Good hearing from you. Hope the baby is doing better.