I'm not sure if there is specifically a 'Barry impregnates Nora' fanfic available. Fanfic availability can vary greatly depending on the fandom and the platforms where fanfics are hosted. You could try searching on popular fanfic websites like Archive of Our Own or FanFiction.net.
Well, it could be themes like friendship if their relationship in the source material has elements of that. Maybe themes of adventure if they go on some sort of journey together in the fic.
If there were a 'Barry impregnates Nora' fanfic, it could be about the relationship between Barry and Nora leading to this situation. It might explore how they deal with the unexpected pregnancy, their emotions, and how it affects their lives and the people around them.
I'm not sure where to specifically find Barry inpregates Nora fanfic. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net. Just type in the relevant tags and see what comes up.
Let's say Barry is a scientist. Flash is his latest invention. Nora, his daughter, is very curious about Flash. Barry decides to let Nora help him with some simple experiments involving Flash. As they work together, Nora learns a lot about science from her dad. They face some setbacks during the experiments, but they never give up. In the end, they succeed, and it becomes a great memory for both father and daughter.
The story where Eobard Thawne tries to rewrite history to make himself the greatest speedster is a great one. He manipulates events in the past and present, and his battles with Barry are intense. It really showcases his devious nature and his determination to be on top. There are also some great emotional moments when Barry discovers what Thawne has been up to, adding depth to the story.
In a family - friendly story, Barry can be the Flash and also a dad to Nora. As a father, he can pass on his knowledge about being a speedster to his daughter. They could have a relationship where Nora looks up to her dad and wants to follow in his heroic footsteps. The dad - daughter dynamic can be shown through their training sessions and how Barry encourages Nora to use her powers responsibly.