bombsh3ll, is vaginal atrophy always a sign that the systemic estrogen levels are low?
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Yes.
Whilst this is not always due to menopause - it can also occur during lactation or medical treatment that suppresses ovarian function - VA is pathognomonic of hypoestrogenism.
Studies have been done in the past looking at the threshold at which this occurs - Philip Sarrell et al in the 1990s tested plasma estradiol in women with and without VA, and found that VA was highly prevalent below a plasma estradiol of 50pg/ml and became much less so as levels increased above this.
Note that this research used US units - this equates to approximately 183pmol/L
This doesn't mean that everyone with VA can or should increase their systemic estrogen levels - obviously if tolerability is an issue or in the setting of breast cancer etc this may not be clinically appropriate, but understanding the physiology and scientific evidence around this is important for making informed decisions.
Particularly in younger women e.g. those in their early or mid 40s and those with concerns about osteoporosis, I believe the presence of VA should prompt a review of whether the individual has an appropriate level of systemic estrogen to optimise their future health.
It is also worth noting that NHS guidance states that "A serum estradiol of at least 250pmol/l is required to promote bone metabolism and reversal of bone loss".
https://www.chelwest.nhs.uk/professionals/gp-hrt-advice-guidance although I personally would favour the level recommended by the late Prof Studd of 300pmol/l to be absolutely sure.
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Really interesting, thanks a lot!
I'll go get a print out of my blood levels to see if I was indeed way too high before. I expect I was though as the symptoms lessened when I halved the dose.
You've given me a lot of food for thought about being more precise with my HRT, which wasn't easy during the pandemic and our surgery under way too much pressure. I have other symptoms of low oestrogen at times. I really only feel well, energetic and my old self one day a month, if I'm lucky it will stretch to 3 days. That's around the time I change over mid month from evorel only to evorel combined with norehisterone (synthetic progesterone). I'm not sure if I'm feeling better because of reaching mid cycle and having had estradiol for 2 weeks, or whether it's the introduction of the progesterone just after. But after two weeks on this I do feel 'ready' for estradiol only again as that's when prolapse symptoms start coming on.
Anyway thanks for replying