Well, a plot twist might be that Regina's pregnancy is a false one, created by an illusion spell. This could be part of a larger scheme to make her look vulnerable and draw out her enemies. Or perhaps the baby she's carrying has some sort of special power that she has to protect it from other magical beings who want to use that power for their own gain. Also, it could turn out that the pregnancy is a result of time - travel shenanigans, where she got pregnant in a different time period and now has to deal with the consequences in her current time.
First, know the characters well. Since it's a 'Once Upon a Time' fanfic, understanding the personalities, backstories, and relationships of the characters is crucial. For example, if you're writing about Snow White being pregnant, remember her kind - hearted and strong - willed nature. Second, create a believable plot around the pregnancy. It should fit within the magical world of the show. Don't just focus on the pregnancy itself but also on how it affects the overall story arc.
A frequent theme is the journey of self - discovery for the pregnant character. In 'Once Upon a Time', many characters have complex backstories and identities. Pregnancy can be a catalyst for them to further explore who they are and what they want for their future and the future of their child. Also, the theme of protection often comes up. With so many threats in the show's universe, ensuring the safety of the unborn child becomes a central plot point in these fanfics.
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.
One popular 'Once a upon a time story' is 'Cinderella'. It's about a kind - hearted girl who is mistreated by her stepmother and stepsisters but eventually finds true love with the help of her fairy godmother. Another is 'Snow White', a beautiful princess who has to flee from her evil stepmother and finds refuge with the seven dwarfs. And 'Sleeping Beauty' is also well - known, where a princess is put into a deep sleep by a curse and is awakened by a prince's kiss.
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.
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.
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.