Cu ions released from copper-releasing Intra Uterine Devices (IUDs) –
- increase phagocytosis of sperms
- prevent ovulation
- make uterus unsuitable for implantation
- suppress sperm motility
Answer
(4) suppress sperm motility
Solution
As per NCERT, IUDs increase phagocytosis of sperms within the uterus, and the Cu ions released by copper-releasing IUDs (CuT, Cu7, Multiload 375) suppress sperm motility and the fertilising capacity of sperms.
Hormone-releasing IUDs make the uterus unsuitable for implantation; IUDs do not prevent ovulation.
Answer: (4)