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

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

-