%0 Journal Article %A M. A. Chadd %A O. P. Gray %A D. F. Davies %T Thyroid Function Tests in the Newborn %D 1970 %R 10.1136/adc.45.241.374 %J Archives of Disease in Childhood %P 374-375 %V 45 %N 241 %X The 131I triiodothyronine (T3) resin uptake test reflects thyroid function more closely than other acceptable tests currently available. The T3 uptake and protein-bound iodine (PBI) level were estimated in 20 premature and 20 full-term infants at birth and at the end of 1 week. The full-term infant has normal adult values, whereas the premature baby has results extending into the hyperthyroid range at birth, but these fall to within normal limits at 1 week. %U https://adc.bmj.com/content/archdischild/45/241/374.full.pdf