An interesting feature of the HCG method is that, regardless of how fat a patient is, the greatest circumference — abdomen or hips as the case may be is reduced at a constant rate which is extraordinarily close to 1 cm. per kilogram of weight lost. At the beginning of treatment the change in measurements is somewhat greater than this, but at the end of a course it is almost invariably found that the girth is as many centimeters less as the number of kilograms by which the weight has been reduced. I have never seen this clear cut relationship in patients that try to reduce by dieting only.
Source: Pounds and Inches by Dr. ATW Simeons, endocrinologist.