Canonically, we don't know who Salad's mother is. They left it too ambiguous and no explanations. Even Naruto supports the idea that Salad is not biologically Sakura's child, but is her adopted mother.
Sorry, but all the "obvious kitten" does not convince me otherwise.
How did they concieve a child when Sasuke and Sakura have spent no time together? Literally, spent no time with each other. Even Sakura says they only spent two and a half minutes with each other at most. The Hiden novels don't reveal anything either.
How did Sakura know where Karin was and one of Orochimaru's hideouts? There is no way she would know.
Sakura knows nothing about Sasuke. I mean, nothing at all, and they still have Salad question her mother's biological parentage and even wedding.
I'm sorry, but Sakura will never be Salad's biological mother because there is no possible way she can be.
And hey, we have to take filler as fact because apparently all of the Naruto fillers are fact now seeing how that is the only way NH got development.
It is bull they keep picking and choosing what is canon and what isn't every time a question needs answered. One minute, something is canon and then the next it is non-canon until a question comes up and then it is canon again.
I am of the opinion that Sakura, as a medical ninja, just acquired some of Sasuke's DNA and artificially impregnated herself. that makes much more sense in MY MIND And I can't be wrong because they never confirmed Medical ninjutsu can't do that. And since Medical/biological tech and manipulation seem advanced enough to clone, why can't they create artificial insemination?............ THAT'S WHAT I THOUGHT!
Well those are my thoughts IF Sakura is in fact the biological mother, indisputably