A third plot could involve a powerful magical artifact. Suppose there is an ancient artifact that has the power to create new life in unexpected ways. Harry, being a wizard, accidentally activates it in Petunia's presence. The story could then revolve around their journey to reverse or deal with the consequences. They might have to seek help from various magical beings, and in the process, they learn more about each other and their family's hidden magical heritage. This could be a story about family secrets, forgiveness, and the power of magic to both create and solve problems.
Another plot could be based on a parallel universe concept. In this universe, the rules of magic and relationships are different. Harry and Petunia might have a more complex relationship due to some altered events in their past. For example, if Voldemort had never existed, the Dursleys might have been more open - minded towards Harry's magic, and in the course of some magical experiment or exploration, an event occurs that results in Petunia's pregnancy. However, the story could focus on how they deal with this situation within the context of this very different world, perhaps with a focus on family unity and acceptance rather than inappropriate implications.
Perhaps in the fanfiction, Itachi and Naruko are on a dangerous mission together. They get trapped in a strange place for a long time. During this time, they rely on each other for survival and their bond deepens. Eventually, Naruko becomes pregnant. But Itachi is worried about his past and the potential danger his enemies could pose to Naruko and their unborn child. So, he tries to find a way to protect them while also coming to terms with his new role as a future father.
One idea could be a magical mishap where a spell goes wrong and creates a false pregnancy situation for Harry. It could be a comical take on the situation as they try to figure out how to reverse it, with Neville feeling extremely guilty and Harry being more amused than angry.
A possible plot could involve a parallel dimension. Percy and Artemis get pulled into a parallel dimension where the laws of nature are different. In this dimension, their powers interact in an unforeseen way and Artemis becomes pregnant. They must find a way to return to their own dimension while also dealing with the consequences of this new situation. They could encounter strange creatures and face unique challenges that test their abilities and their relationship.
One idea could be a story where Itachi uses some sort of unique jutsu that has unexpected side effects on Naruto, leading to a situation that mimics pregnancy but in a non - biological way, like Naruto being affected by a chakra - based spell that gives him symptoms similar to pregnancy. This could lead to comical and heartwarming moments as the characters around Naruto try to figure out what's wrong and support him.
Another idea is that it's all a dream - within - a - dream situation. Harry has a strange dream where Fred gets him pregnant, but when he wakes up, he's still in a sort of dream - like state where things are a bit off. The fanfiction could explore the psychological aspects of Harry's mind as he tries to figure out what's real and what's not, all while having this odd 'pregnant' state to deal with in the dream world.
Yes, there might be some fanfictions that explore this concept in a more innocent or alternate universe kind of way. Some fanfic writers may focus on the relationship dynamics between Harry Potter and Fleur in a non - sexual context, perhaps through some magical or comical plot devices that lead to a situation where Fleur is pregnant, but it's all within the bounds of family - friendly storytelling.
Another plotline could be based on a prophecy. There could be an ancient prophecy that foretold of a union between Salazar (through some form of time - traveling or magical reincarnation perhaps) and Harry that would result in a special child. The story could then focus on how they deal with this unexpected situation, trying to understand the prophecy and their new - found connection.
One plot idea could be Lucario's journey of self - discovery during pregnancy. It could explore how it copes with the physical and emotional changes, and how it interacts with its friends and allies in this new state. Maybe it has to overcome some challenges while still protecting its unborn.
One idea could be that it's a magical accident due to a misfired spell. Maybe Harry was trying to help someone with a fertility spell and it backfired on him. Another could be that it's part of some ancient prophecy where a male must carry a child for a great purpose. And perhaps there's a new type of magic that allows male pregnancy and Harry is the first to experience it in the wizarding world.
A more emotional plot idea could be that Nami gets pregnant by someone she loves deeply, but that person is lost or in danger. She then has to go through the pregnancy alone, with the support of the Straw Hat crew. The story could focus on her growth as she becomes a mother - to - be and how she overcomes the challenges without her partner.