Calcium is used by the body to assist in:
  • Blood clotting
  • Muscle contractions
  • Nerve impulse conduction

Most (98%) of the body's calcium is stored in the teeth and bones. In the blood, about half the calcium is bound to plasma proteins, and about half is free (ionized, Ca++).

Calcium levels may rise in the presence of:

  • Cancer
  • Acidosis
  • Hyperthyroidism
  • Hyperparathyroidism
  • Bedrest
  • Calcium supplements
  • Excessive Vitamin D intake

Calcium levels may fall in the presence of:

  • Decreased plasma proteins 
  • Alkalosis
  • Diarrhea
  • Vitamin C deficiency

Normal Values*

Men 8.8-10.0 mg/dl
Women 9.0-10.5 mg/dl
Pregnancy 8.1-9.5 mg/dl
Children 9.2-11.0 mg/dl

*These are general values taken from a variety of sources. The actual normal values may vary from lab to lab and from one type of testing protocol to another.




Gynecology and Obstetrics CD-ROM
Volumes 1-6
2004 Edition
Lippincott Williams & Wilkins
Copyright 2004
All Rights Reserved