hello all iam 44 yes old female...iam diagnosed with endometriosis and adenomyosis and was advised merina .But Why is my merina getting expelled so frequently asked...my first merina was inserted a year and half back was prescribed meprate along with that....had flow for three months and one fine day it got expelled....and one month later was advised a second merina along with Mefiprestone for amonth all was well for nine months last week even that got expelled...now am on my third merina along with sevista tablet... please suggest what should I do..