Following on from numerous posts about testing estrogen levels, this is the recent statement by the BMS on this.
Hope this might be helpful to anyone whose GP is testing and expects to adjust their HRT on the basis of a blood test.
There is no recommended systemic level of oestrogen in association with use of HRT and response to treatment with HRT should be based on symptom control.
Checking serum oestradiol levels is influenced by many factors including the timing of the dose and type of assay and cannot be assumed to be indicative of levels over a 24-hour period.
Routine testing of oestrogen levels is unnecessary and is associated with an unnecessary cost both to the NHS and patients in private clinics.