Thanks Willow, my NP has spoken to her today and said the same thing, its either a blockage (which she can fix with some energy work and herbs) or its a tumor. So now they will be off the specialist. Fingers crossed.

BTW - how is Keen? I hope her and her girls are well. I followed her journey and was so thrilled when she finally made that announcement.
Lisa, there are several possibilites. He may produce no sperm due to a chromosomal abnormality such as Klinefelters (not treatable) or other, he may have a blockage, he may be experiencing retrograde ejaculation (where the sperm enters the bladder), he may have had undescended testes as a child or he may have a hormonal imbalance. This is not an exhaustive list.

He really needs a specialist consultation. I would urge him not to use herbs or 'energy work' as a primary course of treatment. They will not remove a structural blockage, nor will they identify the root cause of the issue if it is something else.

With ICSI technology (where low quality sperm is injected directly into the egg), even the surgical extraction of a single spermatazoon can result in a pregnancy in theory. So by all means it's not the end of the road, but do encourage him to seek specialist medical advice in the first instance.