Copper
"Most people will only write about their experience if they had a bad one.  So I figured I would lighten the mood and say that the para guard I had put in 7 months ago was a very good decision!  Yes, it was very painful putting it in and had several days of severe cramping.  But, it was well worth it to have non hormonal, non daily, non monthly birth control.  I still get monthly periods, the first few months I had extremely painful cramping but with some ibuprofen it took the edge off.  Feel fortunate if your doctor gave you pain medication before insertion, my doctor told me it wouldn't even hurt.  Warning, if you haven't had kids, insertion is freaking painful!"