Copper ions released from copper-releasing Intrauterine device (IUDs) -

Prevent ovulation

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Make uterus unsuitable for implantation

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Increase phagocytosis of sperms

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Suppress sperm motility

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Solution

The correct option is D
Suppress sperm motility

Copper IUDs primarily work by disrupting sperm motility and damaging sperm so that they are prevented from joining with an egg. Copper acts as a spermicide within the uterus, increasing levels of copper ions, prostaglandins, and white blood cells within the uterine and tubal fluids.

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