"i had the mirena inserted in 3/05, loved it, no complaints. 1 tiny one, her name is gabriella, i found out that while the mirena was still in i was pregnant (3 years into my 5years).  we were very nervous, i was using the mirena because of severe possibility of birth defects with medications i was taking. she is our miracle and we have been blessed. the 99.9% effective is very prominent."