Perhaps the story could focus on the cultural significance of her pregnancy within the different species represented in the crew. Some species might have unique traditions or beliefs related to pregnancy. Kathryn could find herself in the middle of a situation where she has to navigate these cultural differences while also preparing for motherhood. It could also lead to some interesting character development as she learns from and adapts to these various cultures.
Well, a plot could revolve around the mystery of who the father is. It could be someone on the ship or from a previous encounter. And then there could be a sub - plot about how she copes with the potential risks to her and the baby in the dangerous environment of space exploration. She might have to make tough decisions regarding her safety and that of the unborn child.
One idea could be exploring how her pregnancy affects her leadership on the ship. Maybe she has to balance her duties while dealing with the physical and emotional changes of pregnancy. Another plot could involve the reactions of the crew. Some might be overjoyed and protective, while others could be worried about how it will impact their missions.
I'm not sure of specific titles off - hand, but you could start by looking on fanfiction.net. There are often a lot of stories in the Star Trek section that might include this theme. You can search for 'Kathryn Janeway pregnant' in the search bar and browse through the results.
One plot idea could be that 7 of 9 and Captain Janeway have to work together on a dangerous mission to save the ship. They start off with a bit of a rocky relationship due to their different outlooks, but as the mission progresses, they learn to respect and rely on each other more. Another could be a story set in an alternate universe where they are friends from the start and have to deal with a new alien threat that only their combined skills can defeat.
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.
One idea could be exploring how Kairi's friends react to the news. For example, Sora might be initially shocked but then become extremely protective. Another plot could revolve around Kairi preparing for motherhood while still dealing with the challenges in her world. Maybe she has to find a safe place to raise her child away from the ongoing battles.
Well, a great plot could be that Natasha discovers she's pregnant right before a big mission. They then have to decide whether she'll still go on it or not. Steve is all protective and wants her to stay back, but Natasha being Natasha, she has her own ideas. And as the pregnancy progresses, they could start to have different dreams for their child's future - Steve hoping for a normal life and Natasha seeing potential for another little superhero in the making.
Well, the story could focus on Stiles' relationship with the baby's father (assuming there is one). There could be a lot of drama if the father is not ready or if there are some secrets between them. Stiles might also struggle with the idea of becoming a parent so young and how it will change his future plans. He could start thinking about his own family and how his parents' experiences might influence his own journey into parenthood.
One idea could be exploring how Rachel deals with the physical and emotional changes during pregnancy. Maybe she has to balance her work or studies while carrying the baby. Another could be the reactions of her friends and family, like some being overly excited and others being more cautious.