So after Naruto Gaiden chapter 1 was aired we followed Sarada as she learnt about how everyone and their dads are training for the upcoming exams. Sarada went home and asked Sakura about Sasuke, she got angry and literally destroyed the house. Sarada took care of Sakura and went home to get the family portrait, there she finds Sasuke’s image with someone who looks similar to her, Karin! So lets just go ahead and mention that Sarada and Karin look alike, very similar to each other in fact. I would go as far as to say that Karin could be related to Sarada by blood. Now we know that Karin and Sasuke were friends, they worked together ever since they were with Orochimaru. After Sasuke had murdered Orochimaru, Sasuke had recruited and became friends with Karin, Suigetsu and Jugo and formed Taka in order to help the Akatsuki. After Sasuke and Naruto had their incredible fight to end the Naruto manga series with 700 chapters, many shinobi’s dispersed and went their own way. As Gaiden concentrates on most of the kids, we see that after so many years Sarada is born to be of Sasuke and Sakura’s child. She has dark hair, wears glasses and looks extremely like Karin. On top of which we knew that Karin definitely had feelings for Sasuke, whenever he was near to her, she would go all jelly-like and try and get close to him. There is very little evidence proving that Sarada is in fact the daughter of Karin, but since Karin herself had lots of feeling for Sasuke, it’s possible to assume that they did have sex that child could be Sarada. Does Sakura know? Why is she taking care of a child that’s not even hers. Well if Sarada was in fact the child of Karin, then Sakura knows, there could have been some kind of reason that meant that Karin wasn’t able to be there for Sarada and Sasuke may have had to look for others ways to keep Sarada safe at home. What exactly is Sasuke looking for, and why has he gone for so long? Could it be that he’s searching for Karin or something linked to Karin? I guess we’ll soon see. I personally think that both Sarada and Karin are linked, by this I mean that I think that Karin could be the mother of Sarada. Honestly, it could also be some kind of troll from Kishimoto himself, it could be something that he’s trying to accomplish and trying to throw everyone off on Sakura not being the mother of Sarada. So what are your thoughts on this? Do you think that Sarada and Karin are related, are they mother and daughter? , In the latest Naruto Gaiden 7 chapter, Sarada asked Suigetsu about Karin, she is within another of Orochimaru’s hideouts. Sarada revealed her intentions that Karin might be her real mother, Suigetsu uses a machine to test for DNA from Sarada cheek cells, with Karin’s cells coming from somewhere unknown. The results show that both pieces of DNA compared are related, one from Sarada and the other possibly from Karin. This could be a possible conclusion that Karin is the real mother of Sarada! :(

Well, it is not 100% guarantee that Sakura is NOT Sarada's mother. :P

Here are just few of my theories or hyphothesis:

1) Perhaps that sample Suigetsu took from Karin's table is perhaps belong to Sasuke? Since we all know Karin is fandom of Sasuke :D . Moreover, Karin seem to be quite a regular in Orochimaru's place and we all know quite well how Orochimaru wants Sasuke's body before. So it is possible, Karin took a little of that genetic sample which is belong to Sasuke? And Sarada is related to Sasuke, so obviously it is matchs to Sarada. But i feel strongly that this is possible.

2) Maybe Sasuke just took in too much Karin's chakra. -_-

3) Maybe Karin visit Sakura to help Sakura giving birth? Since it is stated that Sasuke been busy with his mission. So maybe Karin actually took that sample during that time!? ( actually I'm not sure whether true or not true occurrence) :V

but overall, even if Sakura really wasn't Sarada's biological mothers, it is no right for Sarada to hate Sakura for that reason. Since i think it is a great courage for Sakura to adopt Sarada while knowing that it is not her own biological daughter.

_ Sakura Hiden (sakura sasuke love story)

But i still hope Sarada is Sakura's biological daughter. I strongly believe it