Hi Kathleen
It's not clear from your post whether you are taking Utrogestan continuously, and I presume you are as you are post-meno?
If this is the case then I would have thought the doctor should actually investigate why you are bleeding - although some bleeding/spotting is expected in the first 6 months or so of using conti HRT.
Firstly re the Utrogestan - you would be more likely to absorb more progesterone using it vaginally than orally because of the uterine first pass effect - the progesterone goes straight to the uterus where it is needed. Taken orally the same dose is not likely to provide the same amount to the womb linging as it is unstable as a compound and some is lost in digestion.
Continuous progesterone does not cause the lining to be shed - it acts on the uterus in a dose dependent way to prevent the oestrogen from building/thickening the lining. It is the fall in progesterone levels that causes a thickened lining to be shed (this sometimes happens with fluctuating progesterone, and especially if the dose isn't high enough to keep the lining thin).
Secondly you have increased to a fairly high dose of oestrogen for someone of your age and post-menopausal and you need to ensure that the progesterone dose is sufficient to prevent uterine thickening.
Abnormal bleeding can be caused by a variety of reasons, one of which is a thickened lining. It could well be that this is what's happening to you, but if might just be a temporary blip, but I am surprised that the doctor did not refer you just to check, although as you have only been taking HRT for a short while this could still be part of the settling in.
Halving the patches may well prevent any build-up of the lining but I am sure ideally you would want to have at least 50 mcg.
I'm not sure about the endometriosis silverlady - this is a condition in which parts of the endometrium are found outside the uterus and in fact the problem is they continue to grow in the presence of oestrogen and cannot bleed.
Hurdity x