"the mirena iud has changed my life. i have pcos and was having really embarrassing, random, and prolonged periods. my doctor suggested the mirena iud. as a woman  that has never had any children, the insertion of the device was excruciating. however, that should be expected when you think logically, having a foreign object inserted into your uterus isn&#039;t exactly natural lol... i had random/light bleeding for about 6-8 weeks after i had it inserted. insertion sucked, give your body time to adapt. this iud is the best thing that has ever happened to me. i&#039;ve had it for almost two years now and i swear by it. patience to let your body adapt and you will not be let down."