FIGURE 2 Serum TSH concentrations by trimester
From the following article:
Therapy Insight: management of Graves' disease during pregnancy
Grace W Chan and Susan J Mandel
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Figure 2. Serum TSH concentrations by trimester
The 95% CIs are shown by the shaded boxes, with the median value also indicated. Adapted from Panesar et al.14 Abbreviations: 1st, first trimester (n = 55); 2nd, second trimester (n = 62); 3rd, third trimester (n = 25); NP, nonpregnant (n = 63).

