Misimplant

Moreover, it was an accidental finding resulting from a misimplanted electrode in an experiment originally designed to study the RAS.

Source: wiktionary

Internet chatter ebbed and flowed with a predictable, prescriptive voyeurism: some readers anguished over the woman's choice to terminate the pregnancy, while others puzzled over the lack of indignation (and indeed the sympathy) evinced by the couple whose egg had been misimplanted;

Source: wiktionary

The wafers may become misimplanted when the implant species comes in […]

Source: wiktionary

And the lasting consequences of an embryo mix-up reach further than any "psychological trauma” associated with “the possibility that the child that [an IVF couple] wanted so desperately” could, because their embryos were misimplanted into another patient, “be born to someone else and that they might never know his or her fate."

Source: wiktionary