One possible fanfiction could be about how the team at NCIS reacts to Jenny's pregnancy. They might be protective and concerned for her, while also dealing with their normal casework. Maybe Gibbs in particular has a special reaction, as they have a complex relationship.
A common theme is the balance between her career and pregnancy. Since she is an officer, she has responsibilities, and the fanfiction might explore how she manages both. Another theme could be the reactions of the people around her, like other officers or the civilians in the Pokemon world.
One possible fanfiction could be about how Ellie Bishop's pregnancy changes her dynamic at work in NCIS. Her colleagues might be overly protective or she could struggle to keep up with the physically demanding aspects of the job while pregnant.
One possible fanfic could be about how Kensi's pregnancy affects her work in NCIS LA. Maybe she has to take on less dangerous tasks while her team mates are extra protective of her. It could also show her dealing with the physical and emotional changes that come with pregnancy, all while still trying to contribute to the investigations.
One common theme is the reaction of the team members. For example, Gibbs might show his protective side in a different way when a team member is pregnant. Another theme is how the pregnancy affects the character's role in the NCIS investigations. They might have to step back or find new ways to contribute.
There could be many interesting plotlines in such a fanfiction. Maybe Percy's pregnancy could bring new challenges to her role in the NCIS team. She might have to balance her work duties with taking care of herself during the pregnancy. For example, she could be more cautious during dangerous investigations, and her teammates might be overly protective of her.
There are several interesting fanfictions on this topic. You can start by looking on popular fanfiction websites like Archive of Our Own. Some might focus on how her pregnancy affects her work as an officer, while others could explore the reactions of her colleagues and friends.
One plot idea could be that Ellie Bishop's pregnancy is part of a larger conspiracy. An enemy discovers she's pregnant and tries to use it against her or the NCIS. She has to fight not only to protect herself and her unborn child but also to prevent the enemy from achieving their malicious goals. This would add a lot of action and suspense to the fanfiction while still centering around her pregnancy.
One possible plot twist could be that Abby tries to hide her pregnancy from her colleagues at NCIS for fear of how it might affect her work. Maybe she's worried about being sidelined from important cases. Another could be that the father of the baby is someone unexpected within the NCIS world, like a character who has had an on - again, off - again relationship with Abby. And perhaps there's a mystery surrounding the pregnancy itself, like some sort of threat to the unborn baby that Abby has to deal with while keeping it all a secret.