I was asked this in the comments of my ‘Mirena and my tinfoil hat’ posting and thought that this would make a better blog entry than it would a response.
The primary difference between the Mirena and the copper IUD is what they’re made of and HOW the body responds to the different materials. Let me put it out there that I’m not a Dr and I am biased. I had a really rough time on the Mirena and feel a bit duped by the medical system so I may not be kind.