Copper
"I would never recommended as a birth control. I got it in 2014 I just got to take it out today in 2017. For the past year-and-a-half I've been so sick. I've been seen special doctors got my gallbladder taken out, and been on many medications because they could never figure out what was truly wrong with me. I had cramping horribly bad and heavy  periods, nausea, vomiting, upset stomach. Always felt like I had morning sickness. Fatigue, brain fog. Finally I saw a link on a website saying how paragard has really bad side effects thank God I clicked on that. I have 85% of all side effects. Found out that the copper on this has been going to my bloodstream and I have what's called copper toxicity. Way too much copper in my body."