Perhaps Sakura is in a dangerous or complex political situation. If she is a prominent figure in a fictional world, her pregnancy could be used against her. So she hides it to protect herself and her unborn child. She might have to deceive those around her, including her closest allies, which could lead to a lot of internal conflict and tension in the story.
In a more romantic - centered plot, Sakura could be in love with someone who she believes is not ready for a child. So she decides to hide her pregnancy from him, thinking it's the best way to handle the situation. Meanwhile, she has to deal with the physical and emotional changes of pregnancy on her own, and as the story progresses, the secrets start to unravel in unexpected ways, causing drama and heartache.
Perhaps Sakura is alone as a result of a broken relationship. She finds out she's pregnant and has to make a decision about whether to keep the baby or not. If she decides to keep it, she starts to build a new life for herself and the unborn child. She might learn new skills, make new friends who support her during the pregnancy, and gradually become more confident in her ability to be a single mother.
I'm not sure specifically if there is a fanfic exactly titled 'sakura hiding pregnant'. There are so many fanfics out there in various fandoms that it's difficult to say for certain without a more in - depth search through relevant fanfic platforms.
One possible plot could be that Sakura discovers she's pregnant and she has to balance her duties as a ninja with her pregnancy. Naruto is super excited but also worried about her safety. They face challenges from the outside world, like enemies who might see Sakura's pregnancy as a weakness to target.
In some fanfics, Sakura could be hiding her pregnancy because she was a victim of a one - night stand or some sort of non - consensual encounter. She's ashamed and doesn't want anyone to know the truth behind her pregnancy. She might be struggling with her own emotions and trying to come to terms with what has happened while also keeping it a secret from those around her.
Well, a plot could revolve around Sakura sharing her pregnancy journey with her friends. Ino could be there to give her advice on motherhood. And as for Sarada, it could explore how she anticipates the arrival of her sibling. Maybe she's a bit jealous at first but then grows to be really excited.
One possible plot could be in a fantasy world where a spell gone wrong results in a character having a 'pregnant belch'. This belch could be like a living entity that the character has to deal with, leading to all sorts of misadventures as they try to find a way to reverse the spell. However, this is a very out - there concept.
In this fanfic, it could be that Bulan is in a relationship that she doesn't want to complicate further with the news of pregnancy. So, she chooses to hide it. Moving out might be her attempt to gain some space and time to think. She may be worried about the reactions of her partner or the society. There could be a backstory where she has seen negative consequences of unplanned pregnancies in her community, and she is desperate to avoid the same. So, she hides the pregnancy and moves out to start anew, away from prying eyes and judgmental voices.
Perhaps the plot could involve a misunderstanding. Gaara is sent to capture or subdue Sakura because she's suspected of something she didn't do. Sakura, of course, won't go down without a fight. She tries to reason with Gaara at first, but when that fails, she attacks. The fanfic could then explore how they gradually learn the truth during the fight. Gaara might start to respect Sakura's tenacity and Sakura might understand Gaara's loyalty to his village better.
Maybe Itachi, despite his stoic nature, starts to have an unexpected soft spot for Sakura. He could be secretly protecting her during her missions, which might lead to some tense and mysterious moments as Sakura tries to figure out who her mysterious protector is.
A plot could revolve around their son being born with a rare illness that Sakura, despite her great medical skills, is unable to fully cure. This leads to a search for a cure across different lands. Naruto, being the Hokage, has to balance his duties with helping his son. Their son, in the meantime, shows great courage and determination, not wanting to be a burden. He trains hard to become strong enough to face whatever comes his way, and along the journey, they encounter many challenges and make new friends who join them in their quest for a cure.