A really interesting plot twist could be that the pregnancy isn't a normal one. It could be some sort of magical or alien - influenced pregnancy. For example, the baby might have powers from the very start of the pregnancy that start to show in strange ways, like affecting Videl's own abilities or causing strange events to happen around her.
One possible plot twist could be that the father of the baby is not who everyone initially suspects. Maybe there's some mystery or misinformation about that. Another could be that Annabeth's pregnancy is part of a prophecy that no one saw coming, and it has far - reaching consequences for the whole world in the fanfiction universe. It could also be that her pregnancy is threatened by some dark force that has a vendetta against her or her unborn child.
Well, perhaps the plot twist is that Gwendolyn is pregnant, but it's not a normal pregnancy. It could be a result of some sort of magical or scientific experiment gone wrong. For example, she was part of a study to find a cure for infertility, and instead, she ended up with an unexpected pregnancy that has strange side - effects. This would change the direction of the fanfiction completely.
A possible plot twist in a Daria pregnant fanfiction is if Daria decides to give the baby up for adoption, but then changes her mind at the last minute. This would create a lot of drama and also show her growth as a character. Or perhaps the baby has some sort of special ability or condition that Daria has to figure out how to deal with, which would be a huge change from the normal Daria - centric storylines.
A possible plot twist could be that Videl turns out to have some hidden powers herself. It would completely change the dynamic between her and Gohan.
Perhaps a plot twist could be that one of them has a hidden health condition that they didn't know about before the pregnancy, which now poses a risk to the pregnancy. This would lead to a lot of emotional turmoil as they struggle to deal with this new situation, and also bring in a medical - mystery - like aspect to the fanfiction.
One possible plot twist could be that Camille discovers she's pregnant right before a major battle or threat in the supernatural world. This would add a layer of protection and vulnerability to her character as she has to not only think about herself but also the unborn child. Klaus, on the other hand, might initially be in shock but then become extremely over - protective, which could change his usually tough - guy attitude in dealing with enemies.
One possible plot twist could be that the pregnancy is a result of a magical spell gone wrong. Maybe a witch with a vendetta against them cast a spell that made Rebekah pregnant with Stefan's child as a way to disrupt their lives. Another could be that it's a false pregnancy caused by some dark entity preying on their fears of starting a family. This would add a lot of drama as they first deal with the shock of the pregnancy and then the realization that it might not be real.
Well, it could be that during the pregnancy, Rapunzel starts having strange dreams. These dreams could be premonitions about the future of their child. It could lead them to a hidden place or a new character who has crucial information about the baby. Also, Eugene could face a difficult decision. There might be a situation where he has to choose between protecting Rapunzel and the baby and fulfilling an important obligation to the kingdom. This would create a lot of internal conflict for him.
One possible plot twist could be that there are misunderstandings about the paternity. Maybe Khushi has some old friends or ex - lovers who come back into the picture and create doubts in Arnold's mind. Another twist could be health - related issues during the pregnancy. For example, Khushi might discover she has a rare condition that requires special care and Arnold has to struggle to find the best medical help for her.
Well, one plot twist could be that the father of her baby is not who everyone suspects. Maybe it's a character who has been secretly in love with her all along. Another could be that there are some supernatural elements affecting her pregnancy, like a curse that changes the nature of the baby.