You're absolutely right, Hurdity! If you have a uterus, there is not going to be enough 'Prog element' going on with Tibolone to prevent thickening. Adding extra T. is another ball game altogether - no one really knows of the effect long term and T in women is assumed safe as it has a long track record (since the 30's apparently) but not enough study has really been done historically.
I think Nick Panay is organising studies at present, as you stated before in another thread.
But - when it comes to adding extra estrogen and no Prog. to Tibolone in women with an intact uterus, the implications could be dire.
Thank you for always being vigilant in these matters - I know in the past you've averted disaster when ladies have been prescribed estrogen only by mistake by their GP who still have a uterus. Good grief - I hope one day GP's will get a handle on all this as a good few really don't seem to know what they're doing! xxxxx