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Copper ions emitted by intrauterine devices containing copper reduce sperm movement. These devices, placed in the uterus via the vagina by medical professionals, come in non-medicated, copper-based, and hormone-based types. Which of the following is correctly matched with its mode of action?

1. Birth control pill — Stops egg release
2. Condom — Blocks sperm from entering the cervix
3. Vasectomy — Sperm absent in semen
4. Copper-T — Inhibits implantation

Correct answer: Copper-T — Inhibits implantation

Solution

Copper-T is an intrauterine device that releases copper ions, which impair sperm function and make the uterus less suitable for implantation. That is why its correct mode of action is inhibiting implantation.

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