There could be. Check out various fanfiction communities. They often have filters or tags that can help you find the more family - appropriate stories about Eren and Historia in this situation. It may take some searching, but they do exist.
It might also be a character who has a more complex or unexpected connection to Historia. For instance, there could be a plot twist where a character who was thought to be an enemy turns out to be the father, adding a whole new layer of drama to the story.
Jiang Xintong was pregnant in the tenth episode of " The Hawthorn Tree in the Distance," but the specific method or reason for her pregnancy was not mentioned. Therefore, I don't know how Jiang Xintong got pregnant.
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Perhaps the fanfiction could focus on the reactions of the other characters. For example, Eren might have complex feelings about Historia's pregnancy, as it could symbolize a new hope for humanity in a way, or he could be worried about her safety in such a vulnerable state.
It could be a story of a wild party or a vacation romance that took an unexpected turn. Or perhaps it was a case of miscommunication about birth control methods.
One idea could be the two of them preparing for the baby. Historia might be learning about different parenting styles, and Eren could be building a nursery. It could show their growth as individuals and as a couple.
It's possible because sperm can live inside a woman's body for up to 5 days. So if you had sex a few days before ovulation and the sperm are still alive when the egg is released, fertilization can occur even if it seems like it's after ovulation.
He could initially be in disbelief. However, as the reality sinks in, Sasuke would start to show his softer side. He might be more attentive to Sakura's needs, like making sure she eats well and rests. He would also start thinking about how to train their child to be a strong ninja in the future, while also wanting to give the child a more peaceful life than he had.
According to the search results provided, there was no mention of someone getting pregnant in the movie. Therefore, I don't know who is pregnant in the Zhou Chuchu Three Maladies.