[Pregnancy associated osteoporosis].

A case of pregnancy associated osteoporosis in a 26 year-old woman's first pregnancy is described. Four months after delivery of a normal boy, the patient presented with back pain and fractures of the thoracic spine (Th 6, 7 and 9). The patient was treated with calcium and vitamin D. After three years the bone density was within normal range and had increased by 19.1% in the hip and 15.8% in the spine, respectively. Bone biopsy and extensive biochemical examinations including collagen analysis could not find any explanation for the observed fractures other than pregnancy.