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 Reference Values During Pregnancy

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Triiodothyronine, free , FT3 (serum)

   Units Nonpregnant Adult First Trimester Second Trimester Third Trimester
pg/mL 2.4 - 4.2 4.1 - 4.4 4.0 - 4.2 Not reported
pmol/L 3.7 - 6.5 6.3 - 6.8 6.2 - 6.5 Not reported

 

References:
1. Abbassi-Ghanavati M, Greer LG, Cunningham FG. Pregnancy and laboratory studies: a reference table for clinicians. Obstet Gynecol. 2009 Dec;114(6):1326-31. PMID:19935037

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