Board Thread:Naruto Gaiden/@comment-1018594-20150610113403/@comment-5547501-20150616102429

Matako wrote: In Japan keeping the umbilical cord is a holy tradition for the mother. It symbolizes the connection between mother and child. It isn't just given away to whoever helped with the birth, though it can be passed down to the child. Giving it away to anyone else is more than just traditionally wrong. Japanese people even have special boxes for those cords for the mother to keep them in. If that's the case then that could be just some more evidence that Karin is actually the mother. I suppose the only real definite way to be sure though is to just wait for the next chapter.