IUDs trigger a release of the _______ that attack the incoming sperm, thus resulting in contraception.

WBCs

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RBCs

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Platelets

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Antibiotics

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Solution

The correct option is A
WBCs

The intrauterine device (IUD) is a very effective method of birth control. It is a small, plastic, T-shaped device that contains copper or hormones. It prevents pregnancy by making the endometrium unreceptive to the fertilized ovum. It stimulates the endometrium to release leukocytes (WBCs) and prostaglandins making it hostile to the sperm.

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