Wow, that's devastating. So sorry to hear about
your situation. I'm not exactly sure how they would do it...but I'd think IVF would be a possibility. To understand, bear with me for a short male anatomy lesson. Sperm cells are produced in the testes and travel through the vas deferens to the seminal vesicles where they are mixed with the ejaculate, which is produced in the prostate. So, most likely, he is not sterile in the sense that he is still producing sperm cells. Problem is, without ejaculate, they don't have any way to get out.
I would think a fertility specialist would be best able to answer your question, I'm sure there is a way to extract his sperm cells and use them. The process will probably not be pleasant at all for him, but I think it should be possible.
Age at Diagnosis: 56
Biopsy: 3 of 12, G3+3, all on LT side, 20%, 5%, 3%
Clinical Stage T2C
Bone Scan, CT scan negative for spread
RALP on 2/17/15, BJC St. Louis, Dr. Figenshau
58.5g, G3+4, 20%, 4 quadrants involved
PSA 3/10/15: 0.10
My Story: www.healingwell.com/community/default.aspx?f=35&m=3300024