Albatross, if it's Greece, you probably have cyclo-progynova. It has the oestrogen pills(white color) and the brown pills (progesterone). You start with the white pills which are I believe 10 - for ten days, then take each of the brown pills for the next 11 days. Then you stop and after 3 -4 days, you get a bleed. Your clinic would have told you when to start the ivf treatment....either from day 2, day 3 or day 4 of your bleed. ..or indeed whether you are going to do another cycle of cyclo-progynova.