Inflamation: The IUD causes inflammation in the uterus which causes the sperm to not survive.
Answered 1/12/2015
6.4k views
Sperm toxicity: Copper ions prevent pregnancy by inhibiting the movement of sperm, because the copper-ion-containing fluids are directly toxic to sperm. The copper ion laden environment creates an inflammatory state that also prevents fertilization and implantation.
Answered 5/26/2015
2.8k views
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