Welcome to Healthcare magic,
High levels of FSH & LH usually indicate testicular failure. This is the reason your doctors are advising you against sperm retrieval
. If you want to be sure that there "isn,t" or I wish "is" any sperm that can be utilized for fertilization there is one test that can help you out of this confusion. You can request your fertility
specialist to perform a testicular biopsy
on him to clarify the situation. This is against the usual protocol but you can still request. As, even if there is a single sperm present it can be utilized for techniques like ICSI
(intra cytoplasmic sperm injection
). This is the only theoritical hope I can suggest you.
Wish you best of luck.