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 Reference Values During Pregnancy

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Vitamin B12 , cobalamin (serum)

   Units Nonpregnant Adult First Trimester Second Trimester Third Trimester
pg/mL 279 - 966 118 - 438 130 - 656 99 - 526
pmol/L 206 - 713 87 - 323 96 - 484 73 - 388

 

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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