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THYROID FUNCTION IN THE NEONATE
Author(s) -
CHAN VIVIAN,
SMITH MARGUERITE,
HALE P. J.,
LANDON J.
Publication year - 1973
Publication title -
clinical endocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 147
eISSN - 1365-2265
pISSN - 0300-0664
DOI - 10.1111/j.1365-2265.1973.tb01719.x
Subject(s) - medicine , endocrinology , thyroid function , triiodothyronine , free thyroxine , hormone , urinary system , thyroid , reverse triiodothyronine , creatinine , pregnancy , thyroid function tests , thyroid stimulating hormone , biology , genetics
SUMMARY Urinary thyroxine and triiodothyronine levels, when corrected for creatinine excretions, were significantly elevated in 5‐day‐old infants as compared with levels in normal adults and women during the third trimester of pregnancy. This was consistent with the finding that their free thyroxine index was increased and suggests that the circulating levels of free thyroid hormones are raised in early infancy. Circulating levels of thyroid‐stimulating hormone were not significantly different at 6 days as compared with adult values.