User blog comment:HollowKing17/Mayuri's Experiment/@comment-5551986-20130614211955

Gin/Kira/An Espada/A battle artifical soul into a corpse/A quincy who died in the battle (though he has experimented on hundreds, not necessarily at stern ritter level) he could be making a son. Kira is a given, considering Unohana/Orihime isn't around. It was stated Soi Fon got her arm back due to the science and research bureau or whatever, he just has his right lung/liver missing. so it would take a little more work than just an arm.