jasmine5, yes, I take 7 x 100mg capsules vaginally every 5 weeks - I have stretched the cycle a bit which I can safely do because I have regular uterine scans and my last lining reading was just 2mm immediately post period. Professor Studd prescribes less Utrogestan than the NHS but I cannot take the NHS recommended dose because I am severely intolerant to all types of synthetic progesterone and high doses of Utrogestan - it triggers migraines so I have to limit its use. I do have a decent bleed after taking the Utrogestan (usually about 5-6 days after taking the last capsule) but this is normal when it is taken cylically. I don't see why having a period would mean you are referred for a scan but do take up the offer, that way, you will be able to see how well it is working at lining clearance.
Trufflecat, why don't you have a scan to see how well it's working? Chances are, the Utrogestan is doing its job at keeping your lining thin, particularly if you are taking it vaginally, and you may not have any build up. I don't think you can guess how much Utrogestan you need, you really need to take it for a few months and then have a scan to see how well it's working. Some women might need more and some might need less but it's better to find out rather than take the wrong dose for years on end. How much oestrogel are you using?