Board Thread:Theories and Speculation/@comment-26622660-20150715231416/@comment-26567684-20150716003406

Imprinting Karin's DNA into Sarada is completely untrue and there is no proof she has abilities similar to the Uzumaki clan. The reason the umbilical cord from DNA test matched with Sarada was because it was actually hers and that Karin kept it for research after helping Sakura give birth to her.