Glossary
Testicles
The male gonad (there are two testicles in the male genital tract) that produces sperm and hormones.
Testosterone
The male hormone responsible for the formation of secondary sex characteristics and for supporting the sex drive. Testosterone is also necessary for spermatogenesis (sperm development).
TFNA (Testicular Fine Needle Aspiration)
Minimally invasive technique to recover sperm where the testis are punctured for sperm aspiration.