First of all, let's consider Sasuke goal:
Sasuke has been dedicated to restoring the Uchiha clan since his first appearance in the manga. 50% Uchiha dna from his side and none from his wife's side is not going to result in a pure Uchiha being born but Sasuke had a plan to remedy this, he decided to make Sakura and Uchiha by transplanting his dna into her, thus making her a fully-fledged Uchiha and making her capable of producing a 100% pure Uchiha child (the Uchiha abilities were also given to protect her, much in the same way Itachi gave his eyes to protect Sasuke)
Proof Uchihas can transplant their dna into another person with a simple poke:
Pure Mangafacts, this cannot be disputed.
Introducing Uchiha Sakura!
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Sasuke has been dedicated to restoring the Uchiha clan since his first appearance in the manga. 50% Uchiha dna from his side and none from his wife's side is not going to result in a pure Uchiha being born but Sasuke had a plan to remedy this, he decided to make Sakura and Uchiha by transplanting his dna into her, thus making her a fully-fledged Uchiha and making her capable of producing a 100% pure Uchiha child (the Uchiha abilities were also given to protect her, much in the same way Itachi gave his eyes to protect Sasuke)
You must be registered for see images
Proof Uchihas can transplant their dna into another person with a simple poke:
You must be registered for see images
Pure Mangafacts, this cannot be disputed.
Introducing Uchiha Sakura!
You must be registered for see images