User blog comment:IamJakuhoRaikoben/Chapter 431 & 432: My sword is... & Brair in Love, Review./@comment-7418318-20150428215301/@comment-76.3.93.2-20150428221733

I read somewhere that she really is Sakura's daughter. The thing is that Sakura had complications with her pregnancy b/c of her excessive use of her jutsu (Strength of a Hundred Technique I assume), and Karin had put her genes in her which is probably why Sarada where's glasses and looks much like her.