Reference Values For Magnesium in Pregnancy

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Reference Values During Pregnancy

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Magnesium (serum)

Units	Nonpregnant Adult	First Trimester	Second Trimester	Third Trimester
mg/dL	1.5 - 2.3	1.6 - 2.2	1.5 - 2.2	1.1 - 2.2
mEq/L	1.25 - 1.9	1.33 - 1.83	1.25- 1.83	0.92 - 1.83
mmol/L	0.63 - 0.95	0.67 - 0.92	0.63 - 0.92	0.46- 0.92

References:

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