Reference Values For Vitamin D, 1,25-Dihydroxy in Pregnancy

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Reference Values During Pregnancy

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Vitamin D, 1,25 dihydroxy-vitamin D (serum)

Units	Nonpregnant Adult	First Trimester	Second Trimester	Third Trimester
pg/mL	25 - 45	20 - 65	72 - 160	60 -119
pmol/L	60 - 108	52 - 169	187 - 416	156 - 309

References:
1. Kratz A, Ferraro M, Sluss PM, Lewandrowski KB. Laboratory reference values. N Engl J Med. 2004;351(15):1548-15632. PMID:15470219
2. 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