"i received my copper iud as the most recommended form of birth control after an abortion (i was in a highly abusive relationship and 17 years old).. anyways, after insertion (painless) i did throw up because of all the pain killers. after insertion was like a normal period. bleeding and cramps. they said sex was safe after 3 weeks. so me, silly and young, had sex 3 weeks later. but had no complications. i&#039;m still with the 3 week later partner, a year later, and we&#039;ve ditched condoms and have an active sex life and i can say it&#039;s 100% effective. i&#039;ve had two experiences where it&#039;s hurt alot after sex but went away after a few hours. but it was nothing compared to the pain of making the wrong choice about a baby. would recommend."