nothing2lose, did you get an answer to your question? I just had what is about my 7th scan on what was meant to be a natural cycle. Apparently I have a thick lining but the FS couldnt find a follicle.....Im now at CD26.....he wants to change me to a artificial cycle.

Anyhow I am also getting a dark 2nd line on the opk...its not quite as dark as the control line but I would say by tomorrow it will be.....

I do have another scan and blood test tomorrow and I think he will make the decision if I will change to the artifical cycle....

Was just interested if you found out if you could surge if you didnt have a dominante folicle....