@Coops0406 There are lots of different protocols. The standard for my clinic is 21 day agonist procedure (long protocol) - so you're downregulated on day 21 of your cycle, wait for a bleed, then start stims. The antagonist procedure (short protocol) you start on day 1 of your cycle, with a Gonadotropin-Releasing Hormone (GnRH) antagonist rather than agonist drug.
The Flare protocol is a bit different and is more commonly used with low AMH or poor responders. The aim of the Flare protocol is to stimulate your bodies natural production of FSH, rather than relying entirely on stims.
I think most clinics will take your bloods when you're in for follicule monitoring appointments.
Dual trigger is when your take a Gonadotropin-Releasing Hormone (GnRH) agonist drug along with your normal hcg trigger. It can only be used on an antagonist protocol (I think thats right anyway!). My consutlant is not really recommending it, but says if we were on the protocol where it can be used, I could decide I want it.
What was your AMH before and how long was the Gap? My AMH was tested last year just before lockdown. In my favour my diet has been a lot better since then which may help, but I can't find an answer as to whether just having a medicated FET cycle where my ovaries were 'shut down' will affect my AMH score.
I think some clinics you can do your FET on the subsequent cycle, but others suggest having 1 'natural' cycle. My clinic certainly advised to have a natural cycle after my failed fresh transfer before starting FET to I imagine its going to be similar this time.