"i had this inserted about 3 years ago.  it was like having really bad cramping for the the remainder of that day.  after that irregular periods for about 6 months to a year.  i have not had any problems that i would know to be related to this.  my periods have pretty much stopped.  it is so easy and i don&#039;t even know its there.  my husband says every once in a while he feels the string but does bother him.  i love it!"