I haven't heard babies would wean, in fact, I heard the exact opposite, that it was more suitable for bfing because of the low dose (local nature) of the IUD. It certainly hasn't affected any woman I've spoken too in terms of milk supply, etc. I know of other issues, but not this one.

Oh cool good to know as weening would be a reason for me not to use!

What other issues do you know off?