There could be. However, the availability of such fanfiction depends on the creativity and interests of the fanfiction writers in the TMNT fandom. Some might find the idea interesting to explore in their stories, while others may not. You can also check Tumblr, as sometimes fans post snippets or links to their fanfictions there.
A possible plot twist could be that April is pregnant, but it turns out that there was some sort of mix - up or false positive. This would cause a great deal of emotional turmoil for both of them. They would have to deal with the disappointment and also re - evaluate their relationship and future plans.
One idea could be that they face challenges in a world that is not fully accepting of their relationship. They might have to deal with the reactions of their friends and family. For example, some of their friends could be initially shocked but then gradually come to support them. The fanfiction could focus on how they grow together as a couple during the pregnancy, learning about each other's fears and hopes.
In this kind of fanfiction, their relationship could also face some strains. The stress of the pregnancy, like financial concerns if they are in a world where that matters, or just the general anxiety about becoming parents, could lead to some arguments. But these arguments would also be a chance for them to understand each other better and grow as a couple. For example, if Donnie is too focused on building a high - tech nursery and neglects April's emotional needs, they would have to work through that and learn to balance their different priorities.
You can start by looking on popular fanfiction platforms such as Wattpad or FanFiction.net. They have a wide range of fan - created stories and there might be some that feature an 'April' being pregnant.
One common theme could be the reactions of the Turtles. They might be protective of April. Another could be the challenges April faces during her pregnancy in a world full of mutants and danger.
Finding 'April pregnant fanfiction' can be a bit of a hunt. You might need to be more specific about the source material. For instance, if it's part of a superhero universe and April is a side - character, the fanfiction could be about how her pregnancy impacts the superhero team she's associated with, or it could be a more character - driven story about her dealing with the unexpected pregnancy while living in a world full of extraordinary events.
Fanfiction.net is also a possibility. Just search for 'April Kepner pregnant' in the search bar, and it should bring up relevant stories. However, the quality might vary, so you may need to read a few to find the good ones.
Some fanfiction might take an interesting turn and have April's pregnancy be a catalyst for a change in her career. For example, she could start a new project at the hospital related to prenatal care, inspired by her own pregnancy journey.
One idea could be that they face challenges in preparing for the baby while also dealing with their usual adventures. Maybe they have to protect their unborn child from an old enemy who resurfaces.