You'll probably notice it inching up. I have been taking mine for 3 years just for the sake of monitoring and I noticed about 6 months ago it wasn't rising as high as it used to (I tend to have a lower # before I ovulate and then it spikes and the day it drops again I get my period) when it should have been spiking. After 4 days of T4 it started inching up again. This morning it was 97.8 - instead of the usual 97.3 it has been of late.
Nat
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A foolish consistency is the hobgoblin of little minds.