Mrs Laron is a 51 year old lady who sees you to enquire about hormone replacement therapy (HRT). She saw your colleague last week about night sweats and flushes which were assessed to be peri-menopause related. Her periods are much less frequent and erratic. She is worried about the risk of breast cancer with HRT which is mentioned in the media and wants to find out more.
Which one of the following statements about HRT is least correct?