Reference ranges of thyroid hormones during the first trimester in Catalan women using the Atellica® IM Solution Immunoassay Analyzer.
Marina GiraltNoelia Díaz-TroyanoImmaculada ComasAlbert BlancoLaura ConesaManel MendozaCarles ZafonMaría GoyaRoser FerrerPublished in: Annals of clinical biochemistry (2023)
We found that in our local population the optimal TSH upper reference limit in the first trimester of gestation was 4.3 mIU/L, similar to that proposed by de ATA-2017 guideline (4.0 mIU/L).