Interesting article. Certainly encouraging. Not sure how I feel about the germ cells being hosted by a live mouse.
I'd be concerned that my son could be Stuart Little if they could not assure me that the human sperm retrieved would include no mouse cells. Shades of Jurasic Park concerns. But science is amazing.
Who would have thoughts years ago that even ICSI was possible and successful. So someday I am sure this or a variant will be an option.