Speaking generally, I think you could perform something like this on sperm stem cells. Sperm turn over (the full population dies and is replaced) fairly quickl

Speaking generally, I think you could perform something like this on sperm stem cells. Sperm turn over (the full population dies and is replaced) fairly quickly, but the stem cells last a long time. It seems more likely they would just, uh, collect a sample of a single sperm cell and treat that, then use it with a treated egg using IVF.