hi.. m glad to answer your query.. globally fbs is the most reliable test done for diagnosing diabetes mellitus
.. if fbs s equal to or more than 126 at two occasions or ogtt >200 at two occasions confirms the diagnosis of diabetes mellitus..
is a test done to see whether your glocose levels were in normal levels in last 3 months.. if HBA1C levels are increased it suggests that you treatment is not succesful n it must be changed.. so its mandatory to get your HBA1C and fbs get done once in three months.. if ur doctor s advicing you these tests too frequently then plz take a second opinion
from some other doctor preferably a diabetician..
as diabetes is a chronic disease and you must take tablets for rest of ur life i advice you to get consultation from a homoeopathic doctor as there is complete cure of diabetes in homoeopathy..
i hope my answer s helpful to you.. wish u a healthy life.. take care.