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. 2020 Jul 13;302(3):763–777. doi: 10.1007/s00404-020-05682-4
Evidence-based statement
Level of Evidence 2a Degree of consensus +  + 
The reduction of osteoporotic fracture risk by HRT is independent of treatment duration (even treatment duration of less than 1 year leads to reduction of the risk of osteoporotic fractures) and age at initiation of HRT. In addition, risk reduction seems to persist after stopping HRT