One interesting plot could be Scully dealing with the challenges of her pregnancy while still being involved in her work. Maybe she has to hide it from some colleagues at first. Another could be how the father of the baby (depending on who it is in the fanfic) reacts and supports her. It could also explore how Scully's pregnancy affects her relationships with her friends and family in the fanfic universe.
In some Scully pregnant fanfic, a plot idea might be that her pregnancy is part of some sort of experiment or has a supernatural element to it. For example, the baby could have special powers. Or perhaps the pregnancy is a result of some time - traveling or alien - related incident. This would add a whole new layer of mystery and intrigue to the story. Also, the story could focus on Scully's struggle with her own beliefs and fears during the pregnancy, especially if it's an unusual situation.
Another plot could be centered around how Mulder and Scully adjust to their new roles as parents while still being FBI agents. They might have to balance cases with taking care of their little one, like bringing the baby along on a relatively safe case and seeing how it changes their dynamic.
One idea could be focusing on the emotional journey of the character. She might feel a mix of overwhelming joy and intense fear. Another could be about the practical preparations for the arrival of four babies, like setting up a huge nursery. Or perhaps the story could revolve around how the family and friends react to this big news.
A possible plot for a 'Ranma 1/2' pregnant fanfic is that it's a result of some magical mishap. This could lead to a search for a way to reverse it, but during that time, Ranma and Akane (or whoever is involved) start to bond in new ways. They could learn more about each other's fears and hopes for the future. Or perhaps it's a plot where an enemy discovers the pregnancy and tries to use it against them, forcing them to come up with creative ways to protect themselves and the unborn child.
Well, they could face a situation where they have to go into hiding during the pregnancy because of the dangerous nature of the clone world. They might find a secluded place where Cosima can have a peaceful pregnancy, but of course, trouble still finds them. Maybe some old enemies track them down, and they have to use their wits and the help of a few trusted friends from the Clone Club to stay safe.
One idea could be exploring how Clary's relationships with her friends and family change. For example, her friends might rally around her to support her during the pregnancy. Another could be the challenges she faces in her daily life, like dealing with morning sickness while still trying to be part of the action in her world. Maybe she has to learn new magical ways to take care of herself and the baby since she's in a unique situation.
One idea could be exploring how Hawkgirl copes with her pregnancy while still having to protect the city. Maybe she has to balance her new physical limitations with her superhero duties.
One idea could be exploring how Skye's friends and family react to her pregnancy. They might be shocked at first but then come around to support her. Another could be Skye dealing with the physical and emotional changes during pregnancy while also trying to pursue her dreams or hobbies.
One idea could be a story about a centaur community's reaction to a pregnant centaur. It could explore how they support her, their cultural traditions regarding pregnancy. For example, they might have special herbs or rituals to ensure a healthy pregnancy.
A plot idea could be that they discover the baby has some special powers or a unique connection to the gods. This would lead them on a quest to understand what it means and how to protect the baby. Also, they could face challenges like financial concerns since they are young and not fully established. Maybe they have to figure out how to balance their heroic duties with their new family responsibilities. This could cause some tension between them as they try to figure out their priorities.
One idea could be exploring how the other characters in the story react to Renesmee's pregnancy. It might cause shock, concern, or even joy among different individuals.