A possible plot for this fanfiction could be that Rose discovers she's pregnant at a very inconvenient time, perhaps right in the middle of a big mission. She then has to decide whether to continue with the mission or focus on her pregnancy. Her pregnancy could also be a symbol of hope in a world filled with danger, and she could be seen as a protector not just of the baby, but of a new future.
A plot could revolve around the mystery of who the father is, if it's not immediately obvious. This could lead to some drama and speculation among the characters. Or it could be about her journey of self - discovery during pregnancy. She might learn new things about herself, her strength, and her capacity to love. Maybe she also has to deal with changes in her relationships because of the pregnancy.
A possible plot could be that Rose discovers she has some special magical ability related to her pregnancy. For example, she might be able to communicate with the unborn child through a unique form of magic. This could lead to all sorts of adventures as she tries to understand this new power and what it means for her and the baby. Or perhaps there are dark forces that are interested in her unborn child because of a prophecy, and Rose has to fight to protect her baby throughout her pregnancy.
One idea could be that they discover the pregnancy in the middle of an adventure. Maybe they're on a planet with some strange energy that affects the Doctor's biology in an unexpected way, leading to the pregnancy. They then have to deal with the challenges of protecting the unborn child while also facing the usual threats in the universe.
Another idea is that they are in a time - locked situation where they are cut off from the TARDIS. They must rely on their wits and the help of some new friends they make in that situation to survive during the pregnancy. It could also be a chance for Rose to learn more about the Doctor's past as they wait for help.
One idea could be that they face challenges from their families who have different expectations for their future. Maybe Rose's family is more traditional and has concerns about their young age and financial stability. Another could be that they discover some unexpected medical issues during the pregnancy, which brings them closer together as they deal with the stress.
Well, perhaps in the fanfiction, the pregnancy could be a catalyst for them to start thinking about their future more seriously. They might start planning a life together off the ship, looking for a place to settle down. It could also lead to some comical situations, like Jack trying to build a makeshift crib in their small cabin.
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.