Levonorgestrel
"I was 45 when I had the mirena coil inserted. I'd never had children so it was painful but bearable. Everyone is different so just make sure you talk any concerns through with your GP. I had a very light period for first three months and occasional cramping but no worse than before I had the mirena inserted, after that I've had 4 and a half years period/cramp free. No side effects whatsoever. My 5 years are up so I'm due to have it removed. Have been told I'll experience the same level of discomfort in the removal so at least I know what to expect and it literally does only take a few minutes."