The adopted child could be a muggle - born with a great potential for magic. Maybe their parents were killed by dark wizards who were against muggles in the wizarding world. Harry and Hermione, having both experienced prejudice, would be determined to give this child a chance.
Well, perhaps in the fanfiction, Harry and Hermione find a child who has special needs in terms of magic. For example, the child has an uncontrollable magical power that scares other families away. But Harry and Hermione see the potential in the child. They start to work together, with Hermione using her vast knowledge of magic and Harry using his own experiences, to help the child learn to control their power. As they do this, they form a very close family unit.
There could be a new dark wizard or witch emerging. This character could be jealous of Harry and Hermione's influence and see the baby as a way to get to them. They might try to harm the baby or turn it against Harry and Hermione, creating a lot of conflict and danger in the story.
In this fanfiction, the plot could start with Harry and Hermione realizing that they want to start a family together in a non - traditional way. They find a baby who has some special powers or a mysterious background. As they adopt the baby, they have to figure out how to raise it while also juggling their own lives as important figures in the wizarding world. They may need to seek help from their friends like Ron and Ginny to create a stable and loving environment for the baby.
It could be a child of a minor god who has been overlooked. Maybe the child of Hecate, a young demigod with some really interesting magic powers that Percy and Artemis see potential in.
They might face social challenges. In the wizarding world, there could be those who don't approve of their relationship or their decision to raise a child together. Also, financial challenges could arise. Even though they are heroes, they still need to provide for the child's needs, like education at Hogwarts which might have costs associated with it.
Obviously, their child is a very popular character. But also, the friends of their child at Hogwarts, like a new generation of Gryffindors or other house students. There could be a character who is a descendant of an old wizarding family that has a special bond with Harry and Hermione's child.
There could also be new dark wizards or witches who envy the power and fame that Harry and Hermione have. They might see the child as a way to get to Harry and Hermione, or they might simply want to prove themselves by challenging the family. For example, a dark wizard who has developed a new and dangerous form of dark magic and wants to test it on the child.
Well, there probably are some 'hermione pregnant with harry's child fanfiction' pieces. Fanfiction is all about exploring what - if scenarios. But it can be a bit controversial as it defies the canonical pairings. It can be interesting to see how writers develop the story, deal with the reactions of other characters, and create new plotlines within this non - canonical concept. Just be aware that it's a departure from the original story that J.K. Rowling created.
Perhaps in the fanfiction, Harry and Hermione raise a child who has a connection to a long - forgotten dark magic. They have to protect the child from those who would use the child's power for evil. Along the way, they face challenges in the wizarding world where some people are suspicious of their decision to raise this special child. But they stand strong, using their combined knowledge and skills to keep the child safe and raise it with good values.