The technique is effective enough that the test arm took a mere hour of practice to successfully bounce back 88 percent of shots and compete with a human.
Building on earlier research, which showed that egg cells from rabbits could be fertilised in test tubes when sperm was added, Edwards developed the same technique for humans.
Egli and other stem cell scientists are eager to replicate the process, to test how reliable and robust it is, and hurdles still remain before the technique is standardized.