For finding 'Once Upon a Time' pregnant fanfiction, you might also try reaching out to other fans of the show. Join 'Once Upon a Time' fan groups on social media platforms like Facebook or Reddit. In these groups, you can post a request asking for pregnant fanfiction recommendations. Fans are usually very helpful and might be able to point you to some great stories they've read.
One common plot theme is the unexpected pregnancy of a main character. For example, it could be Snow White finding out she's pregnant in a way that challenges her role in the Enchanted Forest. Another theme is how the pregnancy affects relationships. Maybe Regina has to deal with her feelings towards someone who is pregnant, and it changes her view of them.
In the fanfiction, perhaps Emma's pregnancy is a magical one. Maybe it was the result of some long - lost magic that got reawakened. Hook would be both excited and a bit scared. They could go on a journey to find a way to ensure the baby's safety in a world full of magic and curses. And Emma might struggle with her usual role as a savior while being pregnant, but Hook would be there to support her every step of the way.
I'm not sure if it's a highly popular genre specifically. Fanfiction is a vast realm with various themes. Some people might be interested in exploring different 'what - if' scenarios for Snow White, but pregnancy - related fanfics might not be as mainstream as other types. It could also be considered a bit of an odd or niche concept within the Snow White fanfiction world.
Family relationships are a big theme. Some fanfics focus on the family dynamics between characters like the Charmings and their descendants. There are also fanfictions that revolve around the theme of identity. Characters in 'Once upon a time' often have complex identities, and fan writers like to dig deeper into how these identities are formed and how they can change over time.
A 'found family' trope is quite common. Characters who were alone or estranged in the show form a close - knit family in fanfiction. For instance, Henry might bring together different characters who then become his new family. Also, the 'hurt/comfort' trope, where a character is hurt (physically or emotionally) and another character comforts them, is frequently used in Once upon a Time fanfics.
One possible plotline could be that Snow White becomes pregnant before she meets the prince. This could lead to her having to hide from the evil queen not only for her own safety but also for the safety of her unborn child. Another could be that after she marries the prince, she faces some sort of magical threat to her pregnancy. Maybe an old enemy of the kingdom tries to harm the heir. Or perhaps she discovers some special power within herself related to her pregnancy that she has to learn to control.
Begin by choosing your favorite characters from 'Once upon a time'. Decide if you want to focus on one character's story or a group of them. After that, plan out the plot. You can make a simple outline of the beginning, middle and end. Consider the setting, whether it's the Enchanted Forest or Storybrooke. Also, think about the tone of your fanfic. Do you want it to be light - hearted, dark, or something in between? Once you have these elements in place, just start writing. Don't worry too much about making it perfect at first, you can always edit later.
A prevalent trope is the 'reincarnation' trope. Fans might write about how the characters are reincarnated in different time periods or worlds and how their relationships are rekindled. 'Power - swapping' is another interesting one, where characters exchange their powers and how that affects their relationships and the story. There are also 'secret relationship' tropes, especially for characters who had a lot of chemistry on the show but never got together officially, like Belle and Will Scarlet. Writers create scenarios where they have a secret relationship and all the drama that comes with it.
You can try websites like Fanfiction.net or Archive of Our Own (AO3). Fanfiction.net has a large collection of fanfics from various fandoms, including Once upon a Time. Just use their search function and type in 'Once upon a Time'. AO3 is also great as it has a well - organized tagging system, making it easier to find specific types of Once upon a Time fanfiction, like those focused on a particular character or relationship.