I am about to have a blood test on Thursday to see whether my thyroid is functioning normally. I have been reading the posts on these pages and am getting increasingly frustrated by my lack of knowledge about the subject - particularly when it comes to test results. I mean, what is T3 and T4, FSH (or whatever it is - I haven't made a note of all these abbreviations!) etc, and what exactly do they signify? What are considered 'normal' ranges? The doctor I saw was a lovely chap - the old-style family doctor - and I am sure that he would take the time to explain the results to me, but there's no guarantee these days that the same doctor will be handling the results or be so patient with someone asking questions. Any brief lexicon on the initials and what they stand for will therefore be very helpful! Many thanks.