One development could be that the pregnancy has some sort of unforeseen magical consequences. For example, it could start to change Harry's magic in unexpected ways. The bond between Harry and Voldemort could become more complex, and it might even start to affect Voldemort's dark magic. Harry might also start to have strange visions or dreams related to the baby and Voldemort's past. And there could be a sub - plot about how Hermione and Ron try to research and find solutions in the Hogwarts library, but they keep hitting dead ends.
Maybe the story could focus on Harry trying to find a way to reverse the situation. He could go on a quest to find some ancient magic or a powerful wizard who might be able to help. There could also be a plot where the Ministry of Magic gets involved, either trying to cover it up or use it as a weapon against Voldemort. And of course, there would be the internal struggle for Harry, dealing with his own feelings about Voldemort and this unexpected pregnancy.
In the 'Harry gets captured by Voldemort fanfiction', Harry could find an unexpected ally within Voldemort's ranks. Maybe a Death Eater who has a change of heart. This ally could help Harry escape or at least send messages to his friends. Another aspect could be that Voldemort performs some dark magic on Harry that gives him strange powers or visions. Harry then has to figure out how to use or overcome these new abilities while still being held captive. It could also be that the wizarding world outside is in chaos due to Harry's capture and different factions start to emerge, some wanting to negotiate with Voldemort for Harry's release and others wanting to go to war immediately.
One possible plot development could be the initial shock and confusion from both Draco and Harry. They would have to deal with the reactions of their friends and the wizarding community. Another could be the struggle to find a way to handle the pregnancy in a world where male pregnancy is unheard of, perhaps seeking out rare magic or potions. Maybe there would be a plot where they have to keep it a secret from their enemies who could use this strange situation against them.
One possible plot development could be that Harry has to face the challenges of being a young father while still dealing with his wizarding duties. He might struggle to keep his family safe from the dark forces that are always lurking in the wizarding world.
It could lead to a lot of drama and conflict. Maybe there would be battles over protecting Harry and the unborn child.
One possible plot development could be the initial shock and confusion for both Harry and Hermione. They would have to deal with the reactions of their friends, like Ron, who might be very surprised or even a bit jealous. Then they'd need to figure out how to balance their new situation with their fight against Voldemort or other magical threats. Another aspect could be how they prepare for the baby, from finding a safe place to live to getting all the necessary baby supplies in the wizarding world.
One possible plot development could be the initial shock and confusion for both Jackson and Stiles. They would have to deal with the unexpected situation, especially considering the implications in the context of their relationship and the world they live in (assuming it's set in a particular fictional universe).
One possible plot development could be the reactions of their friends and family. For example, Edward might be shocked and conflicted, given his past relationship with Bella. Another could be how Bella and Jacob deal with the responsibilities of impending parenthood. They might struggle with financial and living arrangements, especially considering they are still young.
Another aspect could be the challenges they face during the pregnancy. Sally might have health issues, and Percy would have to step up and take care of her. He could start working extra jobs to save for the baby's future. Also, they might need to find a new place to live that is more suitable for a family.
One possible plot development could be that they face challenges in their relationship due to the unexpected pregnancy. Maybe there are family or social pressures.
One possible plot development could be the exploration of the emotional turmoil for both Itachi and Sakura. Sakura might face challenges in her ninja life while dealing with the pregnancy. Itachi, on the other hand, would have to grapple with his own secrets and how this new situation affects his plans.