There are several researches about relation between waist and hip circumference on human health. And the results show that people with more weight around the waist face more health risks than those people who carry more weight around the hips. And to simplify the name, they often call this method as a WHR or Waist to Hip ratio. WHR is also used as a measurement of obesity, where also considered as a possible indicator of other more serious health conditions.
The ratio is applied both to women and men. It is calculated by measuring the smaller circumference of the waist, usually just above the belly button, and dividing by the hip circumference at its widest part of the buttocks or hip. You can classify your health risk based on its result.
Studies show that WHR value 0.7 for women and 0.9 for men correlate with general health and fertility. Women on that range will have optimal levels of estrogen and are less susceptible to major diseases such as diabetes, cardiovascular disorders and ovarian cancers, where men on that range, will be more healthy and fertile with less prostate cancer and testicular cancer possibility. You can continue finding some studies or research in internet about this Waist to Hip ratio, and in the mean time, you can use this simple tool to find your ratio.
You can download the file here.