"Statistics suggest that if somebody has a fragility fracture there's a one-in-three chance they will sustain a further fracture within 12 months.
"Mae ystadegau'n awgrymu, os bydd rhywun yn torri asgwrn oherwydd breuder, fod siawns ym mhob tri achos y byddan nhw'n torri asgwrn arall o fewn deuddeg mis.