Hi Hurdity
I found this article very good for explaining where I am at in terms of perimenopause, and why progesterone supplementation alone may be beneficial - and much more appropriate than the contraceptive pill for managing my symptoms.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3987489/As you'll have seen from the thread, I have started low dose progesterone treatment via a compounded pharmacy - as progesterone treatment alone has never been explored with me through my GP or NHS meno clinic.
I have been quite shocked to find my original symptoms ramp up during this progesterone trial. I have therefore highly researched and discovered a phenonomon which I would describe as 'progesterone in low doses, or when starting out, can antagonise the estrogen receptors'. In fact, some say this is why many women on cyclical hrt suffer as the stop/start approach induces this - although I wouldn't like to comment on that.
Although not a scientific paper, I found this, which explains much better than I can, and will allow you to research further, should you be interested.
https://doc.vortala.com/childsites/uploads/88/files/Why-Some-Women-Feel-Worse-When-Starting-Natural-Progesterone.pdfNot sure there are any scientific papers on this in the UK. Perhaps it's not been studied. However, there is a huge amount of anecdotal evidevce about this, particularly from America - where they often use progesterone therapy.
I personally find other people's experiences much more valuable than any scientific paper. As I do feel this area of pre menopause is lacking in research and advice in the UK.
Only time will tell if this is what I am experiencing. I currently believe the progesterone cream is not strong enough for me and is antognising my estrogen rather than increasing my progesterone sufficiently enough to bring balance.