Pregnancy is a critical period for all women who go through it, whether the pregnancy is regular or high-risk. During the average nine months span of pregnancy, your body goes through many changes, many of which remain unseen by others. You’ll experience headaches, cramps, and frequent urination in early pregnancy. Besides these, the hormonal chaos that your body goes through and changes in blood volume can be significant. Along with those changes, your body can become depleted of vital minerals and nutrients, like calcium. To ward off this depletion, obstetricians prescribe calcium supplements for pregnant women.