Fertilized: Click on the fertilization method under the "Fertilization" heading on the Culture page. You can then click "Delete fertilization" which will rollback the entire fertilization. Note: this includes all gametes in the fertilization instance – not just the one you selected.
Thawed: From a cryostored sample's page, you are able to select "Undo thaw" for any device(s) marked incorrectly as thawed.
Frozen: You are not able to undo freezing events yourself. Reach out to the wawa team for help with any errors that were made, and we will help you get it sorted!
Marked the wrong embryo as having been transferred? Read about how you can solve that.