• bones fracture easily
• most fractures occur before puberty (adult women will occasionally have fractures after menopause)
• can usually be traced through the family
• near normal stature or slightly shorter
• blue or blue-gray sclera (the normally white area of the eyeball)
• dental problems (dentinogenesis imperfecta)
• hearing loss beginning in one’s 20s or 30s
• triangular shape to face
• spinal curvature