Finding yuki x kyo mpreg fanfiction can be a bit of a challenge. Some fans might create and share such stories on their personal blogs or Tumblr pages. However, make sure to respect the rules and regulations of those platforms. Another option is to join some relevant fan communities on social media platforms like Facebook or Reddit. There, you can ask fellow fans if they know of any good yuki x kyo mpreg fanfiction.
I don't have direct access to specific yuki x kyo mpreg fanfiction. But you could start by looking into fanfiction directories. These directories often categorize fanfictions based on the characters and themes. So, look for the section related to yuki and kyo. Keep in mind that the quality and content of fanfictions can vary widely, so you might need to read through a few to find ones that you really like.