Well tests have come back and we have what they keep calling a "baseline" result - every test I have they say it's "baseline"! Hence, the extra period mid cycle. But still no answers as to why this has happened. The scan today revealed a suspicious decomposing follicle which might explain why, but they are still uncertain. Scan today also revealed that the lining was still very thin - basically nothing there - probably because of recent extra cycle mid way through. Lots and lots of follicles though! Clinic now worried about another hyperstimulation scenario and reluctant to increase my puregon to improve the lining thickness. So looks like we may not get an embryo transfer yet again! I hate getting this far and then have to cancel at the transfer stage .