Many-year observation over the changes in glucose tolerance test of different type in 964 women, aged from 17 to 57 years, on free diet and free regimen, was carried out. The changes in glucose tolerance were the more unfavourable--the greater were its deviations during the initial examination. The doubtful tolerance changes, diagnosed by hyperglycemia on fasting stomach, with the normal blood glucose level one and two hours after glucose load, were identical to the normal tolerance changes, serving as a variant of the latter.