There is a huge amount of info out there including the WPATH guidelines that incidentally the UK NHS trusts have nicely formatted into prescribing in testing guides. The only thing is in the UK we seem to use different units for measurements!
There are also loads of research papers out there which are very interesting to read. I'd recommend spending time going through these at least to understand what's happening to your body and the methods your provider are using on your hrt regime.
In addition you can then ask informed questions or request changes if you feel something is off. And if you're like me you just find this stuff extremely interesting. However be prepared to find conflicting information. Even in the profession there are discrepancies and studies of varying quality. WPATH is the main guide but some providers target different parts of the ranges!
