Skip to main content

Advertisement

Table 1 Thyroid Hormone and Thyroid Antibody Values According to Gestational Age

From: Thyroid hormones according to gestational age in pregnant Spanish women

Thyroid Hormones/Antibodies Gestional Age, wka Mean Median 2.5th %ile 97.5th %ile
Thyroid-stimulating hormone (μUI/mL) <11 1.12 ± 0.69 1.00 0.10 2.65
  11 to 20 1.05 ± 0.67 0.92 0.03 2.57
  21 to 30 1.19 ± 0.60 1.12 0.12 2.64
  31 to 36 1.38 ± 0.76 1.29 0.23 3.56
  >36 1.46 ± 0.72 1.43 0.36 -
Free triiodothyronine (pg/mL) <11 3.38 ± 0.52 3.37 2.34 4.34
  11 to 20 3.45 ± 0.54 3.49 2.24 4.43
  21 to 30 3.32 ± 0.43 3.33 2.47 4.18
  31 to 36 3.21 ± 0.53 3.24 2.25 4.16
  >36 3.23 ± 0.41 3.28 2.59 -
Free thyroxine (ng/dL) <11 1.10 ± 0.14 1.10 0.83 1.38
  11 to 20 1.04 ± 0.14 1.02 0.77 1.34
  21 to 30 0.93 ± 0.12 0.93 0.70 1.14
  31 to 36 0.90 ± 0.13 0.89 0.66 1.17
  >36 0.80 ± 0.21 0.85 0.17 -
  <11 0.14 ± 0.21 0.09 0.00 0.68
Thyroid peroxidase antibodies (UI/mL) 11 to 20 0.17 ± 0.33 0.09 0.00 1.04
  21 to 30 0.15 ± 0.23 0.09 0.00 0.89
  31 to 36 0.19 ± 0.45 0.09 0.00 1.27
  >36 0.09 ± 0.08 0.08 0.00 -
Thyroglobulin antibodies (UI/mL) <11 1.04 ± 0.65 0.82 0.41 3.11
  11 to 20 1.08 ± 0.70 0.86 0.34 3.31
  21 to 30 0.92 ± 0.55 0.75 0.37 2.60
  31 to 36 0.89 ± 0.52 0.76 0.38 2.45
  >36 0.90 ± 0.53 0.83 0.46 -
  1. a <11 weeks (n = 330); 11 to 20 weeks (n = 200); 21 to 30 weeks (n = 208); 31 to 36 weeks (n = 269); >36 weeks (n = 14).