Prolonged testosterone treatment to a man results in: (A) increased spermatogenesis, (B) Increased sperm motility, (C) Azoospermia, (D) Increased gonadotropins
Answer is C. Prolonged use of testosterone may produce testicular atrophy thus causing azoospermia. (Ref.Essentials of medical pharmacology TD Tripathi 7th edition page no.299)