Cu ions released from copper-releasing Intra Uterine Devices (IUDs)

Cu ions released from copper-releasing Intra Uterine Devices (IUDs)
  1. make uterus unsuitable for implantation
  2. increase phagocytosis of sperms
  3. suppress sperm motility
  4. prevent ovulation

Solution

Cu ions release by copper-releasing intrauterine devices suppresses sperm motility. Intrauterine devices are inserted by doctors in the uterus through the vagina. They are available as the non-medicated IUDs, copper-releasing IUDs, and hormone-releasing IUDs, these IUDs increase phagocytosis of sperms within the uterus and the Cu ions suppress sperm's motility and fertilizing capacity.
So, the correct answer is 'Suppress sperm motility'.

Asked in: NEET 2010 (Screening)

Practice more Reproductive Health questions on Aicharya