@Whatswrongwithmarjorie It's no different to using a pack of HRT tablets that have 14 days of estrogen, then 14 days of estrogen+progestogen.
Women using pre-packed HRT like this just take the tablets and don't try to work the 2nd half (both hormones in 1 tablet) around a varying cycle.
I wish GPs would be more explicit as this seems to cause constant confusion on this forum!
You choose the same DATE each month.
Your HRT sets a new cycle. Ignore your current one.(That's what women do using a pack of HRT as pill-form.)
What you should be doing right from the start was 2 weeks of estrogen only, then 12 days (the leaflet says 12, not 14) of Utrogestan.
If it's easier to remember, you can take the Utrogestan on the same date each month.
My consultant suggests 1st or 15th day of the month for women using it on a 4-week cycle. So, for women new to HRT it's absolutely fine to start estrogen only and carry on with that until you get to the 1st of the next month, then start Utrogestan. If someone started estrogen on the 1st of the month, they could choose the 15th of the month as their Utrogestan day (and stick to that.)
Ignore the 28 days. It's really a monthly cycle (like we have normally)and months have 30-31 days.
As long as you take 12 days in a calendar month, that is fine.
The 14 days is a 'new' think started by Dr Louise Newson who decided it was easier for women to manage 2 weeks on and 2 weeks off Utrogestan (and she wrote a guide for GPs!)
There is no medical reason to use 14 days unless someone has heavy bleeding on 12 days and needs more.