Copper
"I had the IUD inserted 5 days ago and so far  cannot comment on its effectiveness but I have to say that the insertion was the most painful thing I've experiened and I have loads of tattoos and piercings and a high pain tolerance. It felt like someone was ripping my insides. It was a severe cramp straight away and the rest of the day I lay on the sofa in tears. Never had children but I'm assuming the pain I felt was like contractions of early labour. The cramps come and go but I started my period the very next day after it being inserted so I cannot comment on how long the bleeding has lasted or anything. Period doesn't seem any heavier but the cramps are much worse. Sex hurts any other way than missionary. So far anyway."