For those of you who use the IUD as birth control....what kind do you use and how do you like it? My OBGYN told me of 2 types...the copper one and a new one that lasts like 5 years and releases progesterone into your body. I think it's called Merina or something like that. I've been contemplating using the IUD but don't know which one would be better. I've done several searches on side affects of the Mirena one but can't find much. I was thinking that this one would be just like using the pill (hence side effects) since there is a hormone involved. Any opinons or comments would be much appreciated. Thanks!!!