Question

Cu ions released from copper-releasing intra uterine device IUDs

• A. Make uterus unsuitable for implantation
• B. Increase phagocytosis of sperms
• C. Suppress sperm motility
• D. Prevent ovulation

Answer 1

The correct option is C

Suppress sperm motility

Copper ions prevent pregnancy by inhibiting the movement of sperm, because the copper-ion-containing fluids are directly toxic to sperm. Even if an aggressive little spermatozoa fertilizes an egg, the copper ion laden environment prevents implantation of the fertilized egg, and thus pregnancy.