Task: Answer Verification
Input (English): Question: Is increase of intracellular calcium a cause of pentoxifylline-induced hyperactivated motility or acrosome reaction in human sperm?
Answer: Pentoxifylline stimulates hyperactivated motility and acrosome reaction in spermatozoa from fertile men. Its stimulatory effects occur through mechanism(s) other than increase in intracellular calcium.
Output (English): no