Another option is to ask in relevant fanfic forums. These forums are often full of fans who are into different types of fanfics. Explain what you're specifically looking for, like the fandom you're interested in along with the 'yandere pregnant' aspect. They might be able to point you in the right direction. Just make sure to respect the forum's code of conduct.
I'm sorry, but I don't have specific yandere pregnant fanfic to recommend directly. However, you can try searching on fanfic platforms like Archive of Our Own (AO3). There are a wide variety of fanfics there, and you might be able to find what you're looking for by using relevant tags and keywords.
I've heard of a yandere Hermione fanfic called 'The Yandere Hermione Chronicles'. It starts with Hermione having a crush on a fellow student. As the story progresses, her feelings become more and more extreme. She starts to exhibit yandere behaviors such as spying on the object of her affection, getting jealous of others who are close to them, and even going to extreme lengths to keep them for herself. It's an interesting take on Hermione's character that goes against her usual composed and rational self.
One popular yandere Team RWBY fanfic is 'Yandere Ruby's Obsession'. It delves into Ruby's yandere tendencies in an interesting way, with a plot that keeps you on the edge of your seat.
One popular bts yandere fanfic is 'Obsessed'. It has an interesting plot where the yandere character shows extreme possessiveness towards a member of BTS. The story is full of twists and turns that keep you on the edge of your seat.
One popular yandere RWBY fanfic is 'Obsessive Affection'. It delves deep into the yandere trope within the RWBY universe. The story follows a character who becomes overly possessive and will go to extreme lengths to keep their 'love' interest close. Another is 'Twisted Devotion' which has an interesting take on how a yandere character's actions impact the RWBY team dynamics. There's also 'Fatal Infatuation' that shows a darker side of yandere behavior in the RWBY setting.
One popular yandere female Satsuki fanfic is 'Satsuki's Obsession'. It delves deep into the yandere traits of the character, showing her extreme possessiveness in an interesting way. The story is full of twists and turns as she tries to keep the object of her affection all to herself.
There's also 'Yandere Girl: Unwavering Devotion'. It shows how the yandere girl's love can be both endearing and terrifying at the same time. Her actions are often driven by her all - consuming love for the object of her affection, and the story unfolds with a lot of drama and unexpected twists.
One popular albedo yandere fanfic is 'Albedo's Obsession'. It delves into the darker side of Albedo's character where his yandere tendencies surface in a rather intense way. The story is well - written with a lot of psychological exploration.
One common theme is over - protectiveness. The yandere character, being pregnant, may become extremely possessive and protective of their unborn child and their partner. For example, they might not allow anyone to get too close to them or the baby.
One popular 'yandere shuichi x kokichi fanfic' is 'The Twisted Bond'. It delves deep into the complex relationship between the two characters. The author does a great job of portraying Shuichi's yandere tendencies towards Kokichi in a really engaging way. The story has a lot of emotional depth and the character development is quite interesting.
One good 'yandere dev persona 3 fanfic' could be 'The Darkened Heart in Persona 3'. It has an interesting take on the yandere concept within the Persona 3 universe. The characters are well - developed and the plot keeps you on your toes.