I've found I'm not losing anything. I don't have mirena for BC purposes, more to help cope with my old lady hormones. I had it inserted in June/08. I don't think it is contributing to my WL problems. thought I'd share this link for Mirena support with you.

http://www.womenshealthmatters.ca/u...stlist&Board=13

Also, here's a thread I started here on the Mirena subject:

http://forum.lowcarber.org/showthread.php?t=380497