Table 2.
Reference values from the literature for thyroid function across trimesters of pregnancy.
| Author | Year | Country | fT31 pmol/l |
fT32 pmol/l |
fT33 pmol/l |
fT41 pmol/l |
fT42 pmol/l |
fT43 pmol/l |
TSH1 mIU/l |
TSH2 mIU/l |
TSH3 mIU/l |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cotzias [43] | 2007 | U.K. | 3–7 | 3–5.5 | 2.5–5.5 | 10–16 | 9–15.5 | 8–14.5 | 0–5.5 | 0.5–3.5 | 0.5–4 |
| Soldin [44] | 2007 | USA | TT4: 141.35 nmol/l | TT4: 152.95 nmol/l | TT4: 142.65 nmol/l | 0.91 | 1.03 | 1.32 | |||
| Marwaha [45] | 2008 | India | 1.92–5.86 | 3.2–5.73 | 3.3–5.18 | 12–19.45 | 9.48–19.58 | 11.32–17.7 | 0.6–5.0 | 0.44–5.78 | 0.74–5.7 |
| Springer [46] | 2009 | Czech | 9.55–23.0 | 0.06–3.67 | |||||||
| Karakosta [47] | 2011 | Greece, Crete | 2.37–8.02 | 2.73–8.13 | 12.23–19.69 | 11.2–18.66 | 0.05–2.53 | 0.18–2.73 | |||
| Ekinci [48] | 2013 | Australia | 3.9–5.7 | 3.7–5.2 | 3.5–5.0 | 5.9–15.6 | 4.9–11.3 | 4.4–11.2 | 0.03–3.05 | 0.42–3.36 | 0.34–2.83 |
| Azizi [49] | 2013 | Iran | 8.5–19.0 (fT4I) | 9.7–21.0 (fT4I) | 8.7–20.4 (fT4I) | 0.2–3.9 | 0.5–4.1 | 0.6–4.1 | |||
| Moreno-Reyes [28] | 2013 | Belgium | 2.8–7.1 | 10.3–21.9 | 0.1–2.5 | 0.3–3.0 | |||||
| This study | 2007 | Austria | 4.93 ± 0.59 | 4.54 ± 0.48 | 4.27 ± 0.45 | 15.23 ± 2.43 | 13.79 ± 1.99 | 13.32 ± 2.01 | 1.46 ± 1.29 | 1.68 ± 1.23 | 1.70 ± 2.22 |
Statistical methods: Cotzias: median; Soldin: mean and median; Marwaha: fT3 + fT4: mean, median & percentile; TSH: log; Springer: mean; Karakosta: mean, median and TSH log; Ekinci: fT3 + fT4: mean; TSH: percentile and log; Azizi: TSH log; Moreno-Reyes: mean, median and log; and this Study: fT3, fT4 means, and log TSH means.