TITLE

Challenges in Interpretation of Thyroid Function Tests in PregnantWomen with Autoimmune Thyroid Disease

AUTHOR(S)
Feldt-Rasmussen, Ulla; Bliddal Mortensen, Anne-Sofie; Rasmussen, Ase Krogh; Boas, Malene; Hilsted, Linda; Main, Katharina
PUB. DATE
January 2011
SOURCE
Journal of Thyroid Research;2011, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Physiological changes during gestation are important to be aware of in measurement and interpretation of thyroid function tests in women with autoimmune thyroid diseases. Thyroid autoimmune activity is decreasing in pregnancy. Measurement of serum TSH is the first-line screening variable for thyroid dysfunction also in pregnancy. However, using serum TSH for control of treatment of maternal thyroid autoimmunity infers a risk for compromised foetal development. Peripheral thyroid hormone values are highly different among laboratories, and there is a need for laboratory-specific gestational age-related reference ranges. Equally important, the intraindividual variability of the thyroid hormonemeasurements ismuch narrower than the interindividual variation (reflecting the reference interval). The best laboratory assessment of thyroid function is a free thyroid hormone estimate combined with TSH. Measurement of antithyroperoxidase and/or TSH receptor antibodies adds to the differential diagnosis of autoimmune and nonautoimmune thyroid diseases.
ACCESSION #
74619756

 

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