This may be a bit of a strange question but here goes anyway.... My Partner is an identical twin lets call my OH bill and his brother bob. Both twins were born with their testes in their stomach both had the operation to bring them down into the sacks. Bobs first operation went fine although my oh's operation didn't so had to go back for a second (operation were done very early on as soon as possible). Both have varicocele's although OH's is worse than Bob's (so I have been told). Bob went for a fertility test at the beginning of this year and was told he cannot produce sperm (not sure what this means but none the less he can't have children) I'm worried because me and OH have been thinking about starting to try for a baby, In september he went for a varicocele embolization and was told that it will not effect his ability to have children if anything make it better. I'm worrying if the one twin is infertile is it likely they both are?