One common theme is the exploration of their relationship in different scenarios. It could be them facing challenges together during their space exploration. Another theme is the development of their romantic feelings, how they gradually fall for each other in unique ways.
One common theme could be the challenges they face as a couple with a pregnancy in the context of their Star Trek adventures. Maybe dealing with the unknowns of having a child while being on a starship or in a strange part of the galaxy.
Love and relationship development. The story usually focuses on how Janeway and Chakotay's relationship deepens as they become parents. Their love for each other is often intertwined with their love for the baby.
Some new and upcoming authors also bring fresh perspectives. They might combine modern storytelling techniques with the classic Star Trek setting. So, don't just focus on the big - name authors. Sometimes, exploring works by less - known writers can lead to some really great janeway and chakotay romance fanfiction.
Finding good Chakotay and Janeway pregnant fanfiction can be a bit of a hunt. Another option is to look at Tumblr. There are many Star Trek fans on Tumblr who create and share fan works. Some might have written or reblogged fanfictions with this plot. You can search for relevant tags or ask the Star Trek fandom on Tumblr if they know of any such stories.
One great 'janeway and chakotay baby fanfiction' story could be one where they face challenges together as new parents in the midst of their space adventures. Maybe they have to protect their baby from an unknown alien threat while also dealing with the politics within their ship's crew.
One interesting plotline could be them finally confessing their feelings during a dangerous mission. They might be trapped together, and the fear of losing each other makes them open up.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan-written stories, and you can simply search for 'janeway and chakotay' in the search bar. Another option is FanFiction.net, which also has a wide range of Star Trek - related fanfictions.
There's also 'The Baby Bond'. In this fanfiction, the baby becomes a symbol of hope for the entire crew. Janeway and Chakotay's interactions with the baby bring out different sides of their characters. It shows how they balance their duties on the ship with their new parental responsibilities.