tokens: Metabolic bone disease risk factors , such as maternal obesity , preterm birth , vitamin D deficiency , rickets , and calcium metabolic disturbances , had increased odds of fractures of long bones and ribs in early infancy ( 0 - 6 months ): birth 32 - 36 weeks and long bone fracture [ AOR 2Â·13 ( 95%CI 1Â·67 - 2Â·93 ) ] and rib fracture [ AOR 4Â·24 ( 95%CI 1Â·40 - 12Â·8 ) ] .