She could be pregnant with a half - alien child. This would bring a whole new set of challenges as she tries to protect the child from those who might want to use it for their own purposes. Also, she has to figure out how to raise a child with such a unique heritage.
In a fanfiction, her pregnancy could be a prophecy fulfillment. There could be an ancient prophecy that said a great warrior would be born from her. So, various factions are either trying to protect her or stop the birth, and she has to navigate through all these political and dangerous situations while being pregnant.
Perhaps her pregnancy is a result of time - travel shenanigans. She might have been exposed to some strange time - based energy that caused her to become pregnant. The story could involve her traveling through time to find a way to either end the pregnancy safely or ensure the future of her unborn child.
One interesting fanfiction could be where Sarah Jane Smith's pregnancy is a surprise to her friends. In this story, her companions like the Doctor might initially be shocked but then become extremely protective. They would help her face the challenges that come with pregnancy, such as dealing with alien threats that might target her unborn child.
Adventure is a very common theme. Given her character's history of traveling with the Doctor and having her own adventures, many fanfictions continue this trend, taking her on new and exciting missions. Another common theme is friendship, especially her relationships with the Doctor, her companions, and the friends she makes in her own series. It often explores the deep bonds she forms.
Perhaps the pregnancy is a result of some magical mishap. Sarah then has to deal with not only the physical changes but also the strange magical implications. Jareth could be trying to find a way to reverse it at first but then grows to accept it as their new reality, which would create a lot of drama and character development.
In the fanfiction, the pregnancy could be a symbol of a new beginning for the relationship between Jareth and Sarah. It forces them to re - evaluate their feelings for each other. Sarah might become more empathetic towards Jareth's loneliness in his magical world, and Jareth could start to understand the importance of human emotions. They could embark on a journey to find a safe place for their baby to be born, facing various challenges along the way that test their love and commitment.
Perhaps Jane discovers she's pregnant while Tarzan is away on a long hunt. She then has to fend for herself for a while, relying on the skills Tarzan has taught her. When Tarzan returns, he's overjoyed but also realizes he needs to be more present. They could face challenges like finding proper food for Jane during her pregnancy in the jungle setting.
One idea could be that Jane and Rafael face unexpected challenges during the pregnancy, like financial difficulties. Maybe Rafael's business hits a rough patch and they have to cut back on their lifestyle. Another could be that they find out they're having twins and start preparing for double the joy and double the chaos. They could also have an argument about the baby's name that turns into a big misunderstanding but they eventually resolve it.
In this type of fanfiction, a great plot could revolve around Jane's pregnancy and how it changes her perspective on life. Maybe she starts to question her career choices and whether she wants to continue in the dangerous world of detective work. There could also be a lot of emotional moments with her family and friends. For example, her mother could be overjoyed but also worried. And Isles could be there every step of the way, providing support and sometimes comical relief as she tries to understand all the new things that come with pregnancy like baby showers and choosing nursery colors.
How about a story where the reader is a detective and Sarah is a suspect in a mystery case? But as the reader investigates, they realize Sarah is innocent and they fall in love during the process of clearing her name.
One idea could be that they face challenges in their relationship while expecting. Maybe there are misunderstandings between them as they adjust to the idea of becoming parents. For example, Chuck might be overly worried about protecting Sarah and the baby, which could lead to some friction.
Social media platforms can also be a source. Look for Doctor Who or Sarah Jane Smith fan groups on Facebook or Twitter. Some fans might post links to their fanfiction there or discuss where to find the best ones.