The main characters would obviously be Vegeta and Bulma. Vegeta is the Saiyan prince, a powerful and often brooding character. His presence brings a sense of strength and an otherworldly quality to the story. Bulma, on the other hand, is a human, a brilliant scientist. She's strong - willed and independent, which makes for an interesting dynamic when paired with Vegeta, especially during her pregnancy.
One possible plot could be centered around how Vegeta adjusts to the idea of becoming a father. He's a proud Saiyan warrior, so he might initially struggle with the more nurturing aspects. For example, he could be shown trying to train while also being worried about Bulma's well - being during her pregnancy. Maybe he starts to research Saiyan pregnancies to make sure everything is going as it should.
Their relationship would likely become more intimate and committed. With a baby on the way, Vegeta would probably be more protective of Bulma. He might show his love in more practical ways, like making sure she has everything she needs.
A third fanfiction concept could be about how they prepare for the baby's arrival. Vegeta, not knowing much about Earthling baby things, has to learn. Bulma tries to teach him, and there are a lot of cultural clashes and misunderstandings at first. But as time goes on, they work together to create a perfect nursery and get ready for their new family member.
Frieza or his remnants could be antagonists. They might see the unborn child as a potential threat in the future, especially if it has strong Saiyan powers. So they could plan to attack Bulma to prevent the birth.
The fanfiction could focus on the challenges they face during the pregnancy. For example, Bulma might have some health scares that make Vegeta worry a great deal. He could struggle with his emotions, not knowing how to handle his fear of losing her or the baby. Also, there could be a sub - plot about how the news of Bulma's pregnancy affects the political situation in the Dragon Ball universe. Some enemies might see it as an opportunity to attack while some allies might offer more support than ever.
Well, finding a great Bulma and Vegeta pregnant fanfiction can be a bit of a hunt. You could also check out some Dragon Ball fan forums where fans might discuss and recommend their favorite fanfictions in this category. Keep in mind that different writers will have different takes on their relationship during this time, so you might have to read through a few to find one that really suits your taste.
Also, Dr. Briefs, Bulma's father, could be in the story. He might be helping Bulma with any scientific aspects related to her pregnancy, or just being a supportive father figure during this time. And perhaps some of the other Z - Fighters could make appearances and have their own reactions to the news of Bulma's pregnancy.
One common theme is the power of love. It often shows how Bulma's love can tame Vegeta's wild Saiyan nature. Another theme is family, like how they raise Trunks together.
One great Vegeta x Bulma fanfic is 'A Saiyan's Heart'. It beautifully explores their relationship, from Vegeta's initial gruffness to his growing love for Bulma. The story delves into how they support each other in the face of various threats in the Dragon Ball universe.