Copper
"I have had the copper IUD for close to two weeks. Unprotected sex with my boyfriend and long term birth control are the ONLY pros. Cons include: acne, anxiety, low sex drive, fatigue, weight gain (4 pounds in one week). cramps, random shooting pains. I am a thin woman with a high metabolism & have found it impossible to lose the weight. I look puffy & feel horrible. I wouldn't wish this experience on anyone. I'm getting it removed today."