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Reference Values During Pregnancy


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Calcium, total  (serum)

   Units Nonpregnant Adult First Trimester Second Trimester Third Trimester
mg/dL 8.7 - 10.2 8.8 - 10.6 8.2 - 9 8.2 - 9.7
mmol/L 2.18 - 2.55 2.2 - 2.65 2.05 - 2.25 2.05 - 2.43

Some causes of elevated calcium levels include malignancy , hyperparathyroidism, sarcoidosis, vitamin D intoxication, and hyperthyroidism


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
Wallach, J. Interpretation of Diagnostic Tests, Eighth ed. Lippincott Williams & Wilkins, 2007 Fischbach FT, Dunning MB III, eds. A Manual of Laboratory and Diagnostic Tests, 7th ed. Philadelphia, Lippincott Williams and Wilkins,2004

 

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