Copper
"I've had paraguard for 1 yr. Insertion was nearly painless-no worse than a papsmear to me, esp. compared to the horrible experience I expected after reading negative reviews online (I might have lucked out with a tactile & tactful doctor, but I suggest you have your own experience).IUD hasn't had one noticeable effect on my mood, appetite, or energy. I'm against hormones, so I think some of my positive attitude is due to placebo b/c I want it to work. HOWEVER, even at 1 yr, periods aren't cyclical, sometimes 2x/mo, intermittent spotting, dry blood residues, so I avoid sex sometimes b/c it's embarrassing.This is ironic b/c birth control should enable me to have sex more!Also, the cramps are more painful than any pain I have ever experienced."