I haven't come across a Sasha x Connie pregnancy fanfic myself. However, the existence of such a fanfic depends on the creativity of the fans within the relevant fandom. Some fanfic writers might explore this kind of relationship and plot development, but it could also be that not many have delved into this particular scenario yet. You can check fan - made communities and forums related to the source material to see if anyone has written or knows about it.
One common theme is friendship. Their bond as comrades is often explored, like how they support each other during tough times in their battles. Another theme could be growth. Writers might show how Connie and Sasha grow as individuals while also being friends.
Growth is another theme. Fanfics may show Sasha and Connie growing as individuals within the context of their relationship. They learn from each other, become more mature, and their relationship evolves as they develop new skills and perspectives.
Friendship is a very common theme. Writers often explore how Connie and Sasha support each other through thick and thin. Their different personalities, Connie's more reserved nature and Sasha's boldness, make for interesting dynamics in their friendship.
Sure. There are some really interesting Connie Sasha fanfics on Archive of Our Own. You can search by tags like 'Connie' and 'Sasha' to find ones that focus on their relationship, whether it's a friendship - based story where they go through adventures together in the world they live in, or a story that explores their backstories and how they came to be the characters we know.
There are quite a few. For example, 'Connie and Sasha: A New Chapter' which delves into their relationship after a major event in their story world. It has great character development and explores their emotional connection. Then there's 'Sasha's Secret Admirer, Connie' which is a more light - hearted take on their relationship, with Connie trying to woo Sasha in his own clumsy but endearing way.