with a HRT cycle, there is no definitive "O" date to base everything on, so they can drag it out with the progynova as long as needed to get the ideal circs - then they start the progesterone supplements on the theoretical O date and do transfer based on that

i know it's hard when everything is up in the air like this, but don't worry about the details like cycle day - as long as your lining is thick enough and prolific (not patchy) you're fine to go ahead whenever your hormone levels are where they need to be

good luck with FET

BG