Stem Cells

I know this is probably a touchy subject. But:

My grandmother asked last night if we would be comfortable donating some stem cells from the placenta after baby was born so that she can use them in her knees. (she has bone on bone arthritis.)

Idk where to even begin doing research... but I was wanting to do delayed cord clamping and I'm not sure how that effects it? Anyone heard of this procedure.

TIA