Well, he might time travel to a point in history where a powerful and dangerous jutsu was created. Being pregnant, Naruto has to be extra cautious, but his determination to protect his future child drives him to try and stop the jutsu from being misused. He could also interact with past versions of his friends and allies, and they would be shocked to see him pregnant. This would lead to some interesting character dynamics as they try to understand how this happened and help Naruto achieve his goals.
Perhaps Naruto time travels to a future where his child is grown up. While pregnant, he gets a glimpse of what his child's life could be like and the kind of world they will grow up in. This could inspire him to make changes in the present (his original time) to ensure a better future for his unborn baby. Or, he could travel to a time during a great war and his pregnancy becomes a symbol of hope for the war - torn shinobi, motivating them to fight for a better future for the next generation.
One plot idea could be that Naruto, while pregnant, travels back in time to the founding of Konoha. He uses his knowledge of the future to prevent certain tragedies from occurring during the village's creation, all while dealing with the physical and emotional challenges of being pregnant in a different time. Another could be that he travels to a time when the Uchiha clan was still intact and tries to change the events that led to their downfall, with his pregnancy adding an extra layer of complexity as he has to protect his unborn child too.
One plot idea could be the challenges she faces in balancing her ninja duties with her pregnancy. For example, she might have to take on less dangerous missions but still find ways to contribute to the village. Another could be how her friends, like Sakura, support her during this time. They could offer medical advice or just be there for emotional support.
A great plot idea could be that Hinata's pregnancy reveals some new powers or abilities within her. Maybe it has something to do with the Hyuga clan's bloodline. Naruto is both amazed and a little worried. They also have to deal with the expectations of the village. Some people expect their child to be a great ninja from the start. However, they just want their baby to be healthy and happy. Throughout the pregnancy, they learn more about each other and grow even closer as a couple.
One idea could be that their pregnancies bring the two villages closer together. With Fem Naruto and Gaara both expecting, it could lead to a new era of peace as the two most powerful ninja from their respective villages are about to become parents. This could involve joint efforts in protecting the future of their children, like creating a new safe haven for the new generation.
One idea could be that they have to face the challenges of being pregnant in a world full of shinobi battles. Maybe they have to hide their pregnancies from enemies who might see it as a weakness. Another could be that they support each other through the physical and emotional changes, and their friendship grows even deeper during this time.
One idea could be Naruto going back to the time of the First Hokage to prevent a dark jutsu from being created that later causes chaos in his own time. He could use his knowledge of future events and his powerful jutsu to stop the wrongdoings.
One idea could be that Naruto travels back in time while pregnant and tries to prevent certain tragedies in the village. For example, he could stop the Uchiha massacre. Since he is pregnant, he might have an even stronger motivation to create a peaceful world for his unborn child.
One idea could be exploring how Yennefer deals with the physical and emotional changes during pregnancy while still being a powerful sorceress. Maybe she has to find a way to protect her unborn child from the many enemies she has made.
One idea could be exploring how she and her partner (like Percy) adjust to the news. They might have to deal with the reactions of their friends and family. Another could be the challenges she faces during the pregnancy, like her still wanting to be involved in heroic adventures but having to be more cautious.
One idea could be exploring how Gwen's friends and family react to the news. Some might be overjoyed while others could be worried. Another plot could involve Gwen dealing with the physical and emotional changes during pregnancy while also trying to maintain her normal life, like her hobbies or job. And a third could be about the father's role, if known, and how their relationship evolves during this time.
A plot could revolve around Kushina having premonitions about the future of her unborn child during her pregnancy. She might have dreams that she tries to interpret, and this could add an element of mystery. Also, it could be interesting to see how her pregnancy affects her ninja duties, if she has to take a break or if she finds new ways to contribute while pregnant.