One common theme could be the emotional turmoil of the characters. In a complicated pregnancy, there's often a lot of fear, hope, and stress. Another theme might be the support system around the pregnant character, like how friends and family react. Also, the medical aspects could be a theme, such as dealing with difficult diagnoses and treatments during pregnancy.
Obviously, Beckett would be one of the main characters. There might also be her partner, if she has one in the fanfic's storyline. Her doctor or medical team could also be main characters as they play important roles in dealing with the complicated pregnancy.
Friendship is also often explored. Maybe they start as acquaintances and gradually become really good friends. And there could be themes related to self - discovery. As they interact, they learn more about themselves. For example, Lily might discover a new side of herself because of Beckett's influence. There can also be some mystery - themed fanfics where they solve some kind of mystery together.
One common theme is loyalty. Their loyalty to each other, whether it's in the face of danger or personal challenges, is often explored. For example, in many fanfics, they stand by each other no matter what.
One common theme is the struggle between the vampire nature and human morality. Beckett, as a vampire, often has to grapple with his blood - thirsty instincts while still holding on to some human values.
One common theme is family bonds. Since it's about a father - son relationship, many stories explore how they communicate, misunderstand, and then reconcile. For example, a story might show the son struggling to live up to the father's expectations at first, but then they grow closer as they understand each other better.
A common theme is friendship. Many fanfics explore how Beckett and Alexis become friends and the bond they share. Another theme is growth, as they both develop as characters within the fan - created stories.
One common theme is friendship. Many fanfics start with them as friends and then explore how that relationship can evolve. Another theme is mutual understanding. Since they have different personalities, showing how they come to understand each other is popular.
One common theme is the struggle. Beckett has to fight against the cancer, both physically and mentally. There are often scenes of pain and fatigue.
One common theme could be rivalry. Since it's 'vs' in the title, many fanfics might explore the competitive nature between Beckett and Meredith, whether it's in a professional setting or some other context.
One common theme could be the reaction of the other characters to Beckett's pregnancy. They might be shocked, overjoyed, or concerned.