In 'House Cuddy' pregnant fanfiction, there are several common themes. Firstly, the theme of family and what that means to both of them. For House, who has had a difficult past, the idea of starting a family with Cuddy can be both terrifying and exciting. Secondly, the theme of support. Cuddy may need House's support during her pregnancy, but House himself might struggle to provide it in the way she expects. Thirdly, the theme of the future. How will this pregnancy change their future plans? Will they stay together? Will House be able to step up? All these themes often play out in different ways in the fanfictions.
One common theme could be the change in their relationship. With Cuddy being pregnant, it might bring out a more protective side of House. Another theme could be the challenges they face, like how House deals with the idea of becoming a father while dealing with his own issues. Also, there might be themes related to the medical aspect, such as Cuddy's pregnancy health concerns and how House might be involved in that as a doctor.
Well, a frequent theme is the emotional turmoil. House is a complex character, and the news of Cuddy's pregnancy could stir up a lot of mixed emotions in him. There's also the theme of adjusting to new roles. Cuddy is not only a doctor but also about to be a mother, and House has to figure out his place in this new situation. And of course, the theme of love and how their relationship evolves during this special time is also quite common.