Some common plot twists include things like the baby being born prematurely and having to fight for its life. Or perhaps it's discovered that there's a genetic anomaly that only Sheldon and Penny's combined genes could create. There could also be a plot twist where an old flame of either Sheldon or Penny returns, causing jealousy and tension during the pregnancy.
One common plot twist could be that the pregnancy is unexpected for both of them. Maybe they were just friends or colleagues and then suddenly they find out Penny is pregnant, which throws their relationship into chaos. Another could be that there's some kind of mix - up at the hospital regarding the pregnancy test results, leading to a lot of misunderstandings and drama. Or perhaps Sheldon discovers some new scientific phenomenon related to Penny's pregnancy that no one has ever seen before.
One idea could be that Penny and Sheldon find out they're pregnant unexpectedly. They then have to deal with their different personalities while preparing for the baby. Sheldon might start making scientific plans for the baby's upbringing, while Penny tries to keep things more laid - back and normal.
If Sheldon and Penny were in a fanfiction where Penny is pregnant, their friends in the group would also play important roles. Leonard might be jealous or concerned about how this will change the dynamic. Raj and Howard could offer their own brand of comical advice. The story could explore how the entire group adjusts to this new development, and how Sheldon and Penny's relationship evolves not just as a couple dealing with pregnancy, but also within the context of their friendship circle.
One common theme is friendship. Since they are such different characters in the show, it's fascinating to see how fanfiction writers develop their friendship. For example, Penny might teach Sheldon about social norms while Sheldon might introduce Penny to some scientific concepts in a fun way.
One common theme is the growth of their relationship. Writers often explore how Penny and Sheldon move from being just neighbors and friends to something more. Another theme is the clash of their different worlds. Penny, the actress, and Sheldon, the scientist, have very different lifestyles and interests, and fanfictions often play with how they navigate these differences.
Some Sheldon and Penny fanfictions focus on how Penny helps Sheldon with his social skills in a more elaborate way. She could introduce him to new friends or take him to different social events, and through these experiences, their relationship evolves into something really special and different from what we saw on the show.
One common theme is the idea of opposites attracting. Sheldon is very logical and Penny is more emotional and social, so many fanfictions play on how these differences can draw them together. For example, in some stories, Penny helps Sheldon understand emotions better, while Sheldon helps Penny with intellectual things.
One common theme is friendship development. Fanfictions often focus on how their relationship grows from being just neighbors to really good friends who understand each other's quirks.
The theme of growth is also common. As they fall in love, they both grow as individuals. Sheldon might become more in tune with his emotions, and Penny might become more patient. Another theme is the reaction of their friends. Their friends' opinions and reactions often play a big part in the story.
A frequent theme is the evolution of their relationship. It might start from friendship or just a simple attraction and develop into a deep, loving connection. Also, the theme of acceptance is quite common, as Sheldon has his quirks and Penny has to accept those, and vice versa, in the fanfictions.