Copper
"So I had the ParaGuard for 2 years 2 months before I had it removed last Friday.  I really enjoyed the ParaGuard and my husband enjoyed it as well.  I had heavier periods for the most part while having the IUD inserted.  Up until recently my periods where retiring to normal.  Now your asking why did you have it removed?? I noticed that I was a weeks late for my period and I had breast tenderness.  So I thought to myself no way or can I really be pregnant?  So I took a pregnancy test a week and two days ago and of course it was positive.  I thought to myself I have two kids already I'm almost 33 and I have an IUD how can this be.  So if you get the IUD just keep in mind you could be part of the 1% that gets pregnant like me."