I need to go for a coil fitting. Have had copper coil before and was happy with it (GP had problem fitting Mirena coil that time so went for other one). GP now recommending Mirena. I am kind of interested but wonder if I should stick with what i know I am Ok with, as have a low tolerance of side effects etc. And, on a more curious note, if coil has a good effectiveness anyway, why stick hormones in it as well? Any experiences?