Low temps are a sign of hypothyroidism. It is true that you should not start taking your temp within a few days of TOM because your temps rise in the days leading up to your TOM. I have hypothyroidism, and my temps were the first clue. Although my temp never went above 97.8 no matter when I checked it.

There is a board here for people with thyroid problems. They might be able to give you more info. The link is http://forum.lowcarber.org/forumdisplay.php?f=76.