Most path labs will have the results back to the requesting medic within 24 hours. None of the screens that they are doing for FtM or MtF are unusual and are totally automated. it will take longer to get the blood sample to the lab than it does to do the test.
I can 'cheat' by looking up my results and most are on the reporting system within 2 hours.
What they will check for if LFT = liver function tests, to ensure that you do not develop any liver disease. The liver is the major organ for metabolism of the sex hormones. They will also look for resting levels of FSH, LH. Oestrogen and testosterone and the SHBG= sex hormone binding globulin. They will also be looking for changes in how you metabolise calcium as that is very hormone dependent and will change as you remove oestrogen and increase T. Your RBC profile will also change from a female profile to a male profile (& of course the opposite for MtF to a lesser degree). Increased iron levels and increased Hb with associated increases in packed red cell volume etc will be monitored and there are a variety of tests that examine this and they are lumped under a CBE. In the case of FtM they may also want to look at some of the indicators of muscle development such as CtK, you will be hopefully building up muscle mass while I am definitly losing it (

thank you hormones).
I do think one thing we need to keep in mind is that we are putting our physiology under a lot of stress and good medics and endocrinologists know that, and take time and care to make sure we remain healthy. I've been really quite astonished about how much care my endocrinologist is giving her patients. She is looking at my total health and not just my responses to sex hormones. he wants me to be healthy. And I'm very very happy with the care, I read sometimes here about the slapdash care people are given, and I've got a medical team from psychologists to medics to endocrinologists to radiologists to surgeons who are looking after me. I'm very pleased they are as well

Happy T times
Cindy