A prevalent theme is the support system around Harry. His friends and allies play important roles in helping him through the pregnancy. It could be Hermione providing magical knowledge or Ron being there for moral support. Also, the theme of new beginnings associated with the birth during summer is often seen.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions, and you can use the search function to specifically look for 'Harry mpreg during summer' stories.
One interesting story could be where Harry discovers he's pregnant during a peaceful summer at Hogwarts. The story might focus on how he deals with the shock and hides it from his friends at first. He could be experiencing all sorts of new magical symptoms related to the pregnancy that are unique to the wizarding world.
There's also 'Summer's Arrival'. In this fanfiction, the author focuses on the magical aspects of Harry's pregnancy. It shows how the wizarding world reacts to a male pregnancy, which is quite unique. It has a great plot that keeps you hooked from start to finish.
One possible plot could be that Harry discovers he is pregnant while staying at the Burrow. There could be a lot of chaos as the Weasley family tries to adjust to this unexpected situation. Maybe Harry has to deal with his own fears and insecurities while also getting support from the Weasleys, especially Molly who could be very motherly towards him during this time.
The popularity of'mpreg birth fanfiction' varies. It has a niche following within the larger fanfiction community. Some fans are really drawn to the unique concept it offers, while others may not be interested at all. It's more popular in certain fandoms where the characters' relationships are very strong and fans like to explore different aspects of those relationships, including this rather unconventional one.
No. The idea of'mpreg' in 'Harry Potter' fanfiction is not appropriate for all audiences. It goes against the original nature of the story and may contain themes that are not suitable for younger or more conservative readers.
One interesting story could be about a new magical bond formed during the mpreg. For example, the character might discover new powers related to protecting the unborn child in a way that's unique to the wizarding world. Maybe they can communicate with the baby through magic in a way that normal pregnancies don't allow.
Obviously, Harry Potter himself is the central character as he is the one going through the pregnancy. The Weasley family, especially Molly Weasley, would be involved as the Burrow is their home. Ron and Hermione, being Harry's closest friends, are also likely to be part of the story. Ginny Weasley might also play a significant role, considering her relationship with Harry.
One common theme is the struggle with identity. Harry already has a lot on his plate as 'The Boy Who Lived' and now with being mpreg, he has to reevaluate who he is. Another theme is the support system. It often shows how his friends and allies in the wizarding world either step up or falter in their support for him.