Finally, someone else thinks Sakura is useless.
I have to concur with some of the previous theories, there haven't been any significant female Sharingan users, making me think that its technique only passed onto the men in the Uchiha clan.
There aren't any female Uchihas left.
How many Sharingans have been seen?
.... well, are we including ones from before naruto started, or after the first episode/chapter thingy?
first episode/chapter thingy is 9 or 7 >.>
before naruto started = a whole bunch .>
Excluding that picture from the new chapter, only 6, maybe 7 Sharingans have been seen.
Kakashi, Sasuke, Itachi, that one cop, maybe their dad, Tobi/Madara, and Obito.
Now the female Uchihas that we have seen are that old lady (who got killed along with her husband quite easily), and Sasuke's mom. We couldn't see the old lady's eyes (darn Tsukiyomi), and Sasuke's mom hasn't been in a fight.