Yeah, the more I started reading about the copper, the more I started leaning toward mirena. From what I read, it is just a minuscule amount of hormone. The bc pills rely on flushing your system with hormones and have them brought to your uterus via your bloodstream. Mirena actually dispenses it onsite and there is no detectable increase in hormones in your bloodstream (although you would think that would be the same case for nuva ring)