Breastfeeding creates a tremendous calcium demand. In contrast to pregnancy, the skeleton is the main source of calcium. Therefore, a loss of bone occurs but is transient. Bone density is usually restored within six months after weaning your baby. The good news is breastfeeding does not appear to be associated with increased risk of fractures in later life.
Calcium intake during breastfeeding follows the recommendation for your age. For women 19 and older, the daily recommended intake is 1000 milligrams. More than this is not needed. Also be sure you are taking sufficient vitamin D. Vitamin D is needed for absorption from your intestines.