My daughter was dx with low thyroid when her infant was a roly-poly 3 mo.
old.  The goiter developing in her neck was kind of obvivous.  She has taken
synthroid ever since.  Had difficulty with thyroid level in last pg, had to
do a lot of tinkering with dose, added cytomel.  Still on synthroid and
cytomel 4 yr. pp.  Makes sense that pg & BF, which challenge the body
hormonally, would make these problems more obvivous.
Pat Young in SNJ, USA