Hi MammaG
So have you been taking 200 mg utrogestan orally daily all the time you have been using the oestrogel? If so that is double the licensed dose although variability in absorption when taken orally, as well as variation in dosing of oestrogen, means that some women experience spotting with oral use of only 100 mg utrogestan.
200 mg daily use of Utrogestan vaginally is an excessive dose and I would suggest that if you use it vaginally you use it at the licensed dose which is 100 mg as it acts directly on the uterus.. Although post-meno dosing suggest Days 1 -25 in practice most women do continuous daily use. The 3 days off is to allow shedding of any lining that might have built up though so perhaps good idea to try it this way first when you switch to daily vaginal use?
If you use progesterone continuously it interferes with the oestrogen receptors so that the lining is not stimulated by the oestrogen and so is not built up. This is dose dependent though so if your dose of oestrogen is high and progesterone low - you may well get some build up which would manifest as irregular spotting.
Hope this helps.
There are papers about utrogestan ( micronised progesterone) and I have posted summaries of the abstracts, as have others. There's some here:
http://www.menopausematters.co.uk/forum/index.php/topic,23372.75.html (should be page 6 or 58) as I look at my posts with most recent on top! Hope that comes to right section (my post aug 21st)
Hurdity x