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. 2013 May 15;29(2):167–173. doi: 10.1007/s12291-013-0332-1

Table 3.

Trimester-wise reference data for fT4 according to our study

Trimester Reference interval of fT4 in ng/dl 0.9 CI of lower reference limit of fT4 in ng/dl 0.9 CI of upper reference limit of fT4 in ng/dl
First 0.64–2.0 0.58–0.82 1.98–2.04
Second 0.53–2.02 0.44–0.61 1.93–2.1
Third 0.64–1.99 0.55–0.73 1.9–2.07