It can be either... at least the ones that I know that were sperm tested at F4/F5 level....my high % F5C boy (who at ~14% was more a virtual F3) had absolutely no sperm, and when they examined the testicular tissue it was woefully underdeveloped at 7 months of age and apparently a 3 month old DSH would have better testicles..
At the later generations you can see some sperm that is just so deformed and unformed it is nonviable, that was the case with my first F5 male, he did have good testicles and he was making sperm...just not one of them was swimming forwards... the tails were kinked, snapped off or curled around the body of the sperm.
At the later generations you can see some sperm that is just so deformed and unformed it is nonviable, that was the case with my first F5 male, he did have good testicles and he was making sperm...just not one of them was swimming forwards... the tails were kinked, snapped off or curled around the body of the sperm.
