Table 3.

Serum concentrations of maternal and cord thyroid hormones.

Sample	Free T4 (ng/dL)	Total T4 (μg/dL)	Total T3 (μg/dL)	TSH (μIU/mL)
Pregnant women
n	285	274	276	283
Mean ± SD	0.60 ± 0.2	11.29 ± 2.3	0.16 ± 0.04	2.03 ± 1.3
Median (IQR)	0.57 (0.49, 0.69)	11.16 (9.70, 12.80)	0.16 (0.13, 0.18)	1.76 (1.19, 2.45)
Cord
n	92	116	112	114
Mean ± SD	0.74 ± 0.2	8.36 ± 2.0	0.06 ± 0.02	9.00 ± 6.9
Median (IQR)	0.73 (0.60, 0.88)	8.37 (6.80, 9.80)	0.05 (0.046, 0.066)	6.65 (4.60, 11.00)