Hi my husband had the same procedure done with the same results. You are right, at Invetro clinics there is a way to extract the sperm which is still present. It is quite costly and it requires your partner to do a complete IVF cycle so they can retrieve eggs from her. We've been through it a couple of times with no luck, the good thing is that the guy has to do the extraction only once. I wish you guys the best of luck.