Thank you Hurdity, I have actually been reading some of your previous posts on this topic since posting this message, they were very helpful! I've been diagnosed as early menopause (I'm 42) though I was still having periods so I think the phrase is slightly inaccurate - I'm peri. I'm trying to work out what would be the best cycle length to go for as in general I'm not good with progesterone. Do you think 6 weeks is too long for someone who is peri menopausal, with 100mcg estriadol. Would i be likely to have breakthrough bleeding? I do understand much of it is trial and error - just trying to work out a place to start from and keen to take the least amount of prog I need to!