Board Thread:Boruto Discussions/@comment-10336-20170908030945/@comment-9782468-20170908043604

Piotrus wrote: Well, Suigetsu knew only that the cord belonged to ?/Sarada. ? was to be determined. And then the tests showed ? is Karin. Denying it shouldn't change the outcome, right? If the cord belong to S/S the DNA test should show that, and not implicate Karin. Suigetsu only tested if the umbilical cord itself matched Sarada, not whose cord it was. And it matched Sarada. Since they found the cord itself among Karin's things, they assumed that the cord was between Karin and Sarada.

However, Karin clarifies the situation when she says that the cord itself was actually between Sakura and Sarada, which Karin had since she helped Sakura give birth. The cord never was connected to Karin; if they did a DNA test between the cord and Karin, the DNA wouldn't match.

So, the DNA of the umbilical cord and Sarada was the match shown on screen. The confusion occurred when they assumed the cord was Karin's