Xenotransplantation is the placement of organs and tissues in other species.
There has been extensive research on the use of pig kidneys in humans. This would make Harvard one of the world's top suppliers of embryonic stem cells, the Boston Globe reported . They are not being prepared with the intention of having any rights, commercial or otherwise. According to the Washington Post, most or all of the human embryonic stem cell colonies approved for research funding under a new Bush administration policy have been mixed with mouse cells , which means that any human applications using these cells would likely require FDA approval as xenotransplantation procedures. Here is the Full Coverage page from Yahoo on stem cell research.