Loads of threads here about unwanted side effects from Utrogestan.
It's worth knowing that in the updated NICE guidance 3-monthly HRT is listed as an option for women in peri and post menopause.
This means you take progesterone for 12-14 days every 10th week or so and estrogen only for the rest of the time.
This option is not offered (often/ at all) by GPs but is by (private) consultants.
But no reason why it can't be especially as there is a tablet form for the 3month cycle, called Tridestra.
Some doctors may be concerned there is a risk of hyperplasia with longer cycles, but it's very rare and doesn't usually happen in peri as women are producing their own progesterone some months.