Oct 25, NEW YORK (Reuters Health) - Postmenopausal women who spent longer periods of time breast-feeding their children may be at greater risk of developing osteoporosis, according to a new study. Osteoporosis is a bone disease that occurs when bone tissue and bone density decrease. Patients were separated according to their first pregnancy and breast-feeding age as before or after 27 years. Osteoporosis was defined as a T score of − or . You probably know that breastfeeding holds many benefits for baby as well as for mom—but there may be one downside to it. A recent study has found that the.