Perhaps it could be part of a time - travel plot where Harry somehow ends up in a different era with Tom and due to some strange circumstances becomes pregnant. Another idea could be that there is a dark magic - based curse that results in the pregnancy as a way to manipulate Harry or create chaos in the wizarding world. It could also be a story about two opposing forces being brought together in this very unexpected way and how they deal with the consequences both socially within the wizarding community and personally.
One possible plotline could be a magical accident that leads to the pregnancy. Maybe a spell gone wrong during a battle or an experiment.
Well, it could start with a forced union or a deal made between Harry and Tom for some greater good in the wizarding world. But then this unexpected pregnancy occurs. There could be a lot of internal conflict within Harry about what to do, whether to keep the baby or not. Tom, on the other hand, might have his own motives and plans regarding the pregnancy. Some plotlines might also involve the reactions of other characters like Hermione and Ron. They might be shocked, disgusted, or try to find a way to reverse the situation. And then there could be the overarching plot of how this affects the power balance in the wizarding world, if at all.
Well, a possible plotline might involve a spell gone wrong. Maybe Hermione is researching a powerful and ancient magic and accidentally gets connected to Tom Riddle's essence from the past. Or it could be a situation where she is transported to a different dimension where Tom Riddle is not fully evil yet and they have an encounter that leads to her pregnancy. However, all of these are very much against the grain of the original story and its themes.
One possible plotline could be Goku's reaction to Chichi being pregnant. Maybe he's initially clueless about how to handle it and has to learn about taking care of a pregnant wife. Another could be Chichi preparing for the baby's arrival while Goku is off training but trying to be more present for her.
A plotline might involve the challenges that Margaret faces due to her pregnancy while trying to navigate the situation related to the proposal. It could include things like dealing with family reactions, or how her pregnancy affects the relationship with the person she's engaged to in the proposal. There could also be a plotline where the pregnancy is a secret at first and then gets revealed, causing all sorts of drama and changes in the story.
In some 'One Piece' pregnant fanfics, the plot could revolve around the idea of legacy. If a main character gets pregnant, it could be about the future of the pirate crew or the world of 'One Piece' in general. How will the child grow up? What kind of impact will the pregnancy have on the balance of power in the world? Maybe the unborn child has some sort of special power that is discovered during the pregnancy, and this leads to various factions trying to either protect or capture the mother and the child. There could also be a story about a character who was thought to be infertile getting pregnant, which could be a source of great joy and also potential danger as others may envy or want to harm the mother and child.
Some fanfictions might explore the idea of the child's future. Since it's Harry and Tom's child, there could be speculations about the child's power. Will it be a force for good or evil? And how will Harry raise the child in a world that might be hostile to the idea of their union? There could also be a plotline where the pregnancy forces Harry and Tom to confront their own pasts and the history between them.
Perhaps in the fanfiction, Harry adopts Tom Riddle when he's still a young boy at the orphanage. Harry then uses his own experiences of growing up without parents to bond with Tom. He teaches Tom about magic in a different way than Dumbledore did, focusing on the positive aspects of magic for good. This could lead to Tom not becoming the evil Voldemort we know.
Another plotline might involve Tom believing that Harry has some hidden power that he can extract or use for his own dark purposes. So, he kidnaps Harry to figure out how to access that power. This could lead to a series of attempts by Tom to break Harry's will and get him to reveal the secret. For example, he might put Harry in a magically sealed room and use various spells to try and force the information out of him. Harry, on the other hand, could be trying to resist and find a way to escape or signal for help.
I'm not sure about specific 'Harry pregnant by Tom' fanfics as this is a rather unusual and often not canon - based concept. However, you can try searching on popular fanfic platforms like Archive of Our Own (AO3) where you might find such works if they exist.
Well, a plotline might involve Ahsoka trying to figure out who the father is. It could also be about her facing discrimination or judgment from some in the Star Wars universe because of her pregnancy. Or perhaps she has to find a safe place to have the baby away from the ongoing wars and conflicts. And there could be a story where she uses her pregnancy as a way to bring different factions together in an unexpected way.
In some fanfics, the dwarves could be part of a prophecy. The prophecy states that only the dwarves, with their unique skills and stout hearts, can save the 'Chosen One' - Harry Potter. They might have special abilities that are effective against the dark magic in the Harry Potter universe. For example, they could be immune to certain spells or have the power to break dark magic curses. So they embark on a quest to find Harry, who is lost or captured, and use their powers to free him and defeat the villains.