First, you need to decide on the plot. You could start with how Abby discovers she's pregnant. Is it a planned pregnancy or a surprise? Then, think about the reactions of the other characters. Gibbs might be stoic but concerned, while McGee could be a bit flustered. Also, consider the challenges Abby will face during her pregnancy, like working in the lab with all the chemicals.
There are fanfics where Abby's pregnancy is a big surprise to everyone, including herself. In these stories, her relationship with the baby's father (whichever character the author chooses) can be explored in depth. It could be a story full of drama, with Abby trying to figure out how to balance her new life as a soon - to - be - mother and her important role in the NCIS team.
One possible storyline could be that Gibbs discovers Abby is pregnant and becomes extremely protective. He might start hovering around her at work, making sure she's not overexerting herself. This could lead to some comical moments as Abby is a very independent character and might not take too kindly to Gibbs' over - protectiveness at first.
Their relationship would likely become more intimate and protective. If Abby is pregnant, McGee would be constantly looking out for her, making sure she's not overworking or getting into dangerous situations at work.
Their relationship would likely become more intimate on an emotional level. Gibbs would probably be more open and tender towards Abby, seeing her in a new light as a mother - to - be.
One possible plot twist could be that Abby tries to hide her pregnancy from her colleagues at NCIS for fear of how it might affect her work. Maybe she's worried about being sidelined from important cases. Another could be that the father of the baby is someone unexpected within the NCIS world, like a character who has had an on - again, off - again relationship with Abby. And perhaps there's a mystery surrounding the pregnancy itself, like some sort of threat to the unborn baby that Abby has to deal with while keeping it all a secret.
One interesting angle could be Abby's relationship with her friends at NCIS during the secret pregnancy. How she interacts with them while hiding such a big secret can add a lot of drama. For example, she might have to lie to Gibbs about why she can't stay late at work. Another angle is the medical aspect. Since Abby is in a scientific field, she might be more aware of the risks and intricacies of pregnancy, which could add an extra layer of worry. And finally, there's the angle of how the pregnancy will change Abby's future at NCIS. Will she take a break? Will she still be as involved in cases?
She might become more empathetic. Pregnancy can bring out different emotions, and Abby could start to understand others' situations better. For example, she might be more patient with victims in cases.
One possible plot could be that Abby discovers she's pregnant. McGee would be over the moon but also a bit nervous. They might face challenges at work as they try to balance their jobs at NCIS with the upcoming new addition to their family. Their colleagues could be supportive, but there might also be some concerns about Abby's safety in the field.
One plot idea could be Abby dealing with the changes in her work life. Maybe she has to adjust her lab work due to her pregnancy. Another could be how the team at NCIS supports her during this time. For example, Gibbs might be extra protective.