Hi Ferrals - for what it's worth, after extensive research etc. I have been told that you are only as good as your worst FSH...there is no such thing as improving eggs thus any fluctuation in FSH is only arbitrary although clinic's do seem to use it as a cut-off measurement. You are born with all your eggs, your body never creates any new ones so this makes sense if you think about it. Of course this doesn't mean that a high FSH means you have no good eggs left but it is an indicator that egg quality is poor. I happened to always have decent FSH for my age yet my eggs were fried so in my case it gave me false hope.