I was using one pump a day - after no periods for a year - and just increased it. How do you even know where you are in menopause once you start with HRT?!
You don't really - you may eventually find you don't get mood swings as your cycle becomes much weaker although in some but not all women the Mirena does suppress ovulation.
Mostly it is guessed at through age and what stage of peri-menopause you were at, at the time you started HRT, and only definitively if you stopped using anything for 12 months and didn't have a period. 80% of women have reached menopause by age 54 but of course this leaves a substantial minority who have not!
I was around 54 when i started HRT but had had a period 5 months previously so I have no idea when I got there - but assumed I had a few years later!
Do you feel you want to know?
Hurdity x