Well, it could be that Ginny is pregnant in a world where magic exists (assuming this is related to a magical universe like Harry Potter if Ginny is from there). The pregnancy could bring about some sort of magical phenomenon. Maybe the unborn baby has some sort of special power that starts to manifest during the pregnancy. This could lead to Ginny having to protect the baby from those who might want to use the baby's power for their own gain. At the same time, Ginny has to deal with the normal physical and emotional aspects of pregnancy like morning sickness and mood swings.
Perhaps Ginny discovers some hidden secrets or powers within herself as she copes with Harry's death and the pregnancy. Maybe she has to deal with people who question her ability to raise the child without Harry. The story could also focus on how the child grows up with the legacy of Harry, and whether the child inherits any of Harry's special abilities or traits.
In some fanfictions, Ginny could be pregnant with Lily. One possible storyline could be that it brings a new level of family dynamics. The family might be overjoyed and start preparing for the new arrival. Another could be that there are some challenges during the pregnancy that test the relationships within the family, like Ginny's health concerns or how they manage their other responsibilities while waiting for the baby.
One possible storyline could be about Nina's journey through her pregnancy. It might focus on how she copes with the physical changes, like morning sickness and fatigue. Maybe she has a supportive partner who is always by her side, taking her to doctor appointments and helping her with household chores. Another could be that Nina discovers she's pregnant at an unexpected time, like when she's in the middle of achieving a big career goal. This creates a conflict between her personal and professional life.
One possible storyline could be Ginny having to hide her pregnancy from the enemy to protect herself and the unborn child. She might rely on the help of her closest friends and family to stay safe.
Another storyline could involve the reactions of their friends. Hermione and Ron might be there to support Ginny throughout her pregnancy. There could be a lot of scenes of them sharing their experiences and knowledge about having a baby, adding a touch of friendship and camaraderie to the story.
It could be that Ginny is part of a bet or a dare. Her friends or acquaintances might have challenged her to pretend to be pregnant for a certain period. In the fanfiction, this could lead to all sorts of comical and complicated situations as she tries to keep up the pretense in front of different people.
Perhaps in the fanfic, Ron is away on some important mission when Ginny discovers she's pregnant. When he returns, he has to quickly adapt to the situation. They then decide to keep the pregnancy a secret for a while to avoid unwanted attention and drama within the wizarding community.
Another idea is that the father of the baby is a mystery, and Harley goes on a journey to figure out who it is. Along the way, she discovers things about herself and her past relationships. This could involve her visiting old friends or foes and reminiscing about different parts of her life.
Well, one possible development could be that Ginny has to deal with the reactions of her family and friends. They might be shocked at first but then come around to support her.
One possible plot could be that Harry and Ginny are overjoyed at the news of Ginny's pregnancy. They start preparing for the baby's arrival by setting up a nursery in their home at Grimmauld Place. Ginny might take a break from Quidditch, and Harry would be extra protective, constantly worrying about her safety. Their friends like Hermione and Ron would be excited and offer their help, bringing baby clothes and giving advice based on what they've read in wizarding parenting books.