The lack of full understanding about the causes and development of endometriosis is one of the obstacles to finding a cure for the disease, as well as defining all the risk factors associated with it. “Because some women might have endometriosis, but do not have symptoms, it is difficult to know exactly how many women have the condition. Current estimates suggest that 6% to 10% of women of reproductive age have endometriosis, or approximately 5 million women in the United States,” explain the National Institutes of Health (NIH) in their published resources on endometriosis.
However, research has demonstrated there are certain factors involved in the process. Having a mother, sister or daughter with endometriosis increases the risk of suffering from the disease by about sixfold, but having any other member of the family with it is also a risk factor. It is also known that women who menstruate for the first time before the age of 11, who have short monthly cycles of less than 27 days, or heavy menstrual cycles that last more than seven days, are also particularly at risk.