A great idea for this fanfiction could be that Rose starts having dreams about their future child. These dreams could give them clues about the baby's purpose or the challenges they will face. The Doctor would be very interested in these dreams and try to analyze them scientifically.
In the fanfiction, Rose's pregnancy could be a catalyst for the Doctor to finally settle down in one place for a while. Maybe they find a peaceful planet where they can build a home and prepare for the arrival of the baby. Their friends from their adventures might come to visit and offer their support. It could also lead to some interesting cultural clashes as they combine their different upbringings and knowledge to raise the child.
The Doctor would likely be both excited and terrified. He'd be extremely protective. He might start modifying the TARDIS to be a safer place for Rose and the baby, adding things like special shields or a nursery area.
Adventure is another theme. Since they travel through time and space together, many fanfics have them going on all sorts of exciting adventures, whether it's saving a planet or exploring a new era. It adds to the overall charm of their relationship as they face these challenges together.
Another idea is that they are in a time - locked situation where they are cut off from the TARDIS. They must rely on their wits and the help of some new friends they make in that situation to survive during the pregnancy. It could also be a chance for Rose to learn more about the Doctor's past as they wait for help.
Another interesting one is 'Parallel Worlds'. In this fanfiction, it explores different parallel universes where the Tenth Doctor and Rose's relationship takes on various forms. It's full of creative ideas and really makes you think about the possibilities of their relationship.
One popular theme is the adventure aspect. Fans often write about the baby growing up in a world full of time - traveling and alien encounters, just like the Doctor and Rose had. Another theme is family. It could be about how the Doctor, Rose, and their baby form a unique family unit, dealing with the challenges of being part of different species. Also, the theme of protecting the baby from various threats, both from within their own universe and from other dimensions, is quite common in these fanfictions.
One popular one could be 'A New Beginning' where they start their married life on a new planet, facing all kinds of adventures together. It's full of their typical banter and sweet moments.
The fanfiction might be a heartwarming tale of their journey together during Rose's pregnancy. Or it could be a thrilling action-packed story with them facing off against powerful foes.
Yes. Fanfiction gives writers the chance to envision different situations for beloved characters. Pregnancies are a common theme explored in various fanfictions, and Doctor Who and Rose are no exception. It's all about the fans' creativity and what they think could add an interesting twist to the story.