Hello everyone! I was very worry with this bad odor; I the bad odor started two weeks after putting Mirena. Then, because I am VERY CURIOUS, I tried to find a good explanation for that. I was searching in many articles, (because you do not see this in anything, anywhere, in normal websites). So, what happens is: the hormone released by Mirena CHANGES our microbiota. SO, WHAT TO DO? Just keep a diet with very LOW sugar, eat fibers (vegetables, fruits) and TAKE PROBIOTICS. It really works... I took before sleeping one capsule of a cluster of probiotics, in a high dose (e.g. 5 billion of L. acidophillus, B. lactose, L. paracasei, L rhamnosus - very easy to find) and I woke up without any odor. Amazing. It can help thousands of people!