How to handle the plot of a dragon child in How to Train Your Dragon fanfiction?

You could give the half-dragon unique powers and struggles. Maybe it has trouble fitting in with either dragons or humans.

You could start by considering how the pregnancy affects Astrid's character development and her relationship with Hiccup. Maybe explore how the other characters in the story react and support her.

Well, you could have the main character learn self-defense skills or find a supportive friend to stand up with them.

Well, including such explicit content is not a good idea. Fanfiction is better when it explores character development, new adventures, or expands the world of the original work in a meaningful way without going into such inappropriate territory.

You could start by imagining a unique backstory for Hiccup's reincarnation. Maybe he retains some memories from his past life or gains new powers.

When dealing with mature content in How to Train Your Dragon fanfiction, you need to consider the age group of your potential readers and the terms of service of the platform you're posting on. Also, be tasteful and avoid going overboard.

Avoid it completely. Such content is not appropriate and should not be engaged with.

You could have other characters care for him, like Astrid bringing him medicine and soup.

You could start by fleshing out the daughter's character, giving her unique traits and goals. Make her journey interesting and full of adventure.

Handling lemon themes in How to Train Your Dragon fanfiction requires a delicate balance. You should respect the source material, consider your audience, and avoid going against the established lore and values of the franchise.