Copper
"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'm still with the 3 week later partner, a year later, and we've ditched condoms and have an active sex life and I can say it's 100% effective. I've had two experiences where it'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."