@Charlie74 You and I are going to be travelling a very similar path re our FETs and lining. Monash's minimum is 6mm. LB prescribed me Viagra upon CFC's request. CFC are going to start my cycle one week early than normal and have an earlier lining scan, then if it's still low, which for me over 5 cycles has been 6.8 to 7.4mm, then they can add the Viagra. I think it's very sensible of them to add in the extra week as a buffer.
A little tip, and you may already know this, I didn't....once you start on Progesterone support (for me it's Gestone injections 5 days prior to transfer, for you I'm guessing it's Crinone) your lining won't grow any further.
It seems a lot of girls are now inserting a portion of their lining meds vaginally. I first noticed it on the Greek donor egg thread but have now noticed it popping up more and more over the Aussie threads.
Re only being on 10mgs of Progynova, apparently you can't overdose on it..but don't quote me on that!
Im going to be following you like a hawk and trying to learn as much as I can about how you've managed to boost your lining to some super dooper level!
For me I've never tried the patches, so that will be new for me. I hope they're not too expensive? And I'm going to try some Progynova vaginally as well as orally.
Sorry for such a long reply!!