There's four bacteria I can't crossbreed, it doesn't show up in the Crossbreed place. Is it not implemented in the game yet? (Milking Bacteria, Rectum Parasite, Nipple Bacteria, Ovary Parasite)
Pregnancy, Breed, Breast Expansion, Vore, Crossbreed · By
All pathogens are implemented, check this post https://itch.io/t/3843983/tips-on-getting-all-pathogens