How does a IUD works ?
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The other IUD option is the copper IUD, brand name ParaGard. It works by releasing copper ions into your cervix–no hormones here. Copper makes your uterus a pretty hostile environment for sperm. Your cervix begins to produce a thick mucus that sperm can't navigate navigate through to get to your egg.
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The copper-coated IUD prevents pregnancy by not allowing the sperm to fertilize the egg. It may also make it harder for a fertilized egg to implant in the uterus. An IUD coated with progestin works in a similar way, but also thickens the cervical mucus and thins the uterine lining.
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