Okay. I don't want to be the downer, but I felt I had to reply.
I don't know much about copper IUD's. When I was discussing birth control options with my MD after I had DS, I told him I did not want b/c that was hormonal. He suggested the Mirena IUD. He said it does have hormones released, but "they are minimal and don't have really bad side effects". He told me that copper IUD's have an increased risk for something, but I don't remember what (tried to steer me away from the copper one). I wish I would have done more research, but our insurance was about to run out (like, within a couple of weeks) and I had to get something quick. I opted for the Mirena IUD. I wish I would done more research and talked to more women who have had the copper one inserted.
I HATE my Mirena. I haven't had a period in 2 1/2 years (as well, I don't think I have had any normal hormone fluctuation). I have NO libido. I mean, like NONE. I think my IUD has slipped or shifted...I can still feel the strings, but sex is sometimes painful. I want it OUT. But DH does not want any more children(
another story) and right now we have no health insurance and we can't find a doctor willing to sterilize either of us because we're "too young". I JUST turned 25, so I do have better chances of finding a MD that will sterilize me, but DH is 21...and it's so much less expensive and less painful, less recovery time, etc etc, if he gets snipped.
Anyways, didn't mean to turn this into a rant-fest about my issues. Just passing along my experience with Mirena. IMO, don't get one. I honestly think that the MD tried to "sell me" on the Mirena (for whatever reason), because he strongly discouraged using the copper one, and all I've heard recently is good stories from women who use the copper IUD.
There's my .02.