Non-pregnant
1st trimester
2nd trimester
3rd trimester
TSH (µ/l)
0.3–4.2
0–5.5
0.5–3.5
0.5–4
Free T4 (pmol/L)
9–26
10–16
9–15.5
8–14.5
Free T3 (pmol/L)
2.6–5.7
3–7
3–5.5
2.5–5.5
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