So the last child of Team Seven I have in mind is Uchiha Yukito -- a boy, then, born when Sakura is about 45 or possibly even later... yes, she's menopausal by then, advanced medical jutsu FTW! The kid is born via artificial insemination, because even though Sakura carries him, genetically, apart from her mitochondrial DNA he really is a pure Sasuke/Naruto baby. (basically they found a way to empty one of her ovums from her own DNA and replace it with Naruto's. Or maybe Sasuke's. I haven't decided yet who wins the battle for "No, YOU get to be Yukito's biological mom!")
This is what I know about him:
For someone who is made in equal parts of Uchiha Sasuke and Uzumaki Naruto's genes, Yukito's mild, laid-back disposition is nothing short of confounding. Sometimes Sakura entertains herself with the thought that her last child is so easy-going out of sheer perverseness. No doubt he would have inherited it straight from her, somehow.
Yukito has grayish brown hair, and also the sharingan, but he'll never develop it farther than the second tomoe. He's content with being average. Everyone in his family is extreme in some way and it's all very tiring, really. D:
I was toying with the thought of a real threesome baby, though truly since a kid gets half and half from their parents it's a bit hard to have three parents, unless you pick and choose who gives which genes, and that would take CENTURIES. But maybe you could merge two sperm cells and get that one to fertilize the egg, and then the baby would be half Sakura and one fourth each Naruto and Sasuke. (no sharingan for that one.) But at her age, Sakura can't really afford to have more than one, very closely supervised pregnancy. Even that one wouldn't be great fpor her health, so two of them back to back would be too much.
.. Twins are hardly an easy pregnancy, but she figures they'd still tire her out less than two separate ones, especially ones as medically watched over. I'm just not sure which medical discovery would come first (the two father, no mother thing, or the two-fathers-merged-as-one, one mother.) Because the offer Sakura made was basically to let Sasuke and Naruto experience the one single bond they yet hadn't, which is all very selfless, but if they can make threesome babies... um.
Then again it might be easier to merge two sperm cells with medical jutsu and then use those than to do the ovum thing, so Sakura might mention it as a stepping stone on the way to the two-dads thing, and later they might suggest to use it as well, half as her "reward" for being so selfless, a kid who is more her than either of them, but also either of them, and half because omg threesome baby. Also, maximizing uchiha clan genetic diversity is always good.
But, I don't know. If they can do one, would they really do the other one. Both solutions make the other one a bit redundant.
Then again is there really a ceiling on happiness and empty nest syndrome. XD
But just in case, the threesome baby would be a girl called Kahen, which means petal, because Sakura's mom is Hana (flower) and Sakura is a specific type of flower, so she might as well go with part-of-flower for the third generation. (dunno what Kahen'd call her own kid, though. Chlorophyll cell? XD)
I have NO IDEA what her personality would be like, though. >___> I planned the other three around subverted Mary-Sue types to give myself a starting point (team seven children would veer close to Sue just by virtue of having the parents they have anyway), but I already have the FemmeFataleSue type and the PrettierAndBitchierThanYou!Uchiha type and the... well, first kid is still spoiler. What could I twist -- oh my god, a GothSue. XD ("Kahen? KAHEN??? MY NAME IS OOKAMI MOONRAVEN!!" pffff) okay um maybe not... Maybe not even a sue-type either.
edit: ( ... okay so Goth sounds like too much fun to say not to, right now. XDDD )