I had a Mirena coil fitted about 18 months ago (for heavy bleeding) and since then I've gained a pound and a half every month. My GP says the Mirena doesn't cause weight gain and won't remove it. Has anyone else experienced weight gain on the Mirena? I'd honestly rather flood every month than deal with this uncontrollable weight gain. I'm so hungry all the time. I can eat my dinner and still want another dinner even though I know I've eaten enough.