I was diagnosed with hypothyroidism while TTC. My original value was 2.9, which is technically normal, but the RE said a pregnant woman should always be below 2.5 (I actually read the study by the American Thyroid Association that said this).

I got pregnant at that level and was retested a month later and had a 2.59. At this point they put me on levothyroxine (synthetic thyroid) and retested again a month later. That value just came back at .44.

This seems really low, and I'm worried about swinging to hyperthyroidism so I'm curious as to what were your TSH values during pregnancy if you had hypothyroidism?